CN113837818A - Method and system for generating electronic invoice - Google Patents

Method and system for generating electronic invoice Download PDF

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Publication number
CN113837818A
CN113837818A CN202110943031.0A CN202110943031A CN113837818A CN 113837818 A CN113837818 A CN 113837818A CN 202110943031 A CN202110943031 A CN 202110943031A CN 113837818 A CN113837818 A CN 113837818A
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China
Prior art keywords
electronic
invoice
electronic invoice
data
data information
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CN202110943031.0A
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孟岑
许芳函
刘辉
张克玲
龚勇浩
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Aisino Corp
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Aisino Corp
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Priority to CN202110943031.0A priority Critical patent/CN113837818A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/04—Billing or invoicing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F40/00—Handling natural language data
    • G06F40/10—Text processing
    • G06F40/166—Editing, e.g. inserting or deleting
    • G06F40/186—Templates

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  • Business, Economics & Management (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Development Economics (AREA)
  • General Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Artificial Intelligence (AREA)
  • Accounting & Taxation (AREA)
  • Economics (AREA)
  • Finance (AREA)
  • Marketing (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Character Input (AREA)

Abstract

The invention discloses a method and a system for generating an electronic invoice, wherein the method comprises the following steps: acquiring data information of an electronic invoice to be issued, wherein the data information comprises an invoice identifier of the electronic invoice to be issued; selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice drawing identifier; filling the data information into the electronic invoice layout file template to obtain an electronic invoice file; acquiring electronic seal data of an electronic invoice to be issued based on the mark issuing identification; and performing a signature on the electronic invoice file through the electronic seal data to generate an electronic invoice comprising the electronic seal data. The electronic invoice generation method provided by the invention has the advantages of higher generation efficiency and stronger cross-platform applicability, thereby realizing better user experience.

Description

Method and system for generating electronic invoice
Technical Field
The invention relates to the technical field of electronic invoice issuing, in particular to a method and a system for generating an electronic invoice.
Background
With the continuous maturity of policies such as marketing improvement, electronic invoices and the like, value-added tax electronic invoice services have been promoted so as to meet the invoicing requirements of enterprises under different scenes, and the issuing, delivery and query of electronic invoices are carried out on the premise of safety and reliability.
In the prior art, invoice issuing is carried out by directly filling invoice information in invoice software and transmitting the filled information to the invoice software through a mobile phone, and finally an electronic invoice or a paper invoice is issued. The disadvantages are that: 1. invoicing times are slow because of the fill-in of invoice information involved. 2. Different invoice types need to be selected, and the operation is complex.
The prior art (CN 110570609A) discloses an intelligent terminal device for issuing invoices based on a tax bureau invoice issuing U shield, wherein when all hardware is connected, when the terminal device passes through a WIFI or LAN network module, whether an invoice issuing instruction exists in an invoice issuing platform server is monitored in real time; after an invoice issuing instruction is monitored, an invoice issuing signal is sent to system general control module invoicing software; acquiring invoice information needing to be issued from an invoicing platform server; analyzing the invoice information, and carrying out validity check on the invoice information; calling a tax bureau to provide a tax control interface through a USB module, transmitting invoice issuing information to a tax bureau U shield, and performing invoice issuing operation; the invoice issuing operation result is pushed back to the invoice issuing platform server through the WIFI or LAN network module; after the invoicing is finished, a complete flow is completed, whether the invoicing instruction exists in the invoicing platform server is monitored in real time again, and then the flow can be circulated infinitely.
In the prior art, a user needs to log in mobile terminal or computer client software, transmit invoice information needing to be issued to an invoice management system, and then issue an invoice. The billing method in the prior art is inconvenient and poor in user experience.
Therefore, there is a need for a technique to enable simple and secure issuing of electronic invoices.
Disclosure of Invention
The technical scheme of the invention provides a method and a system for generating an electronic invoice, which aim to solve the problem of how to rapidly and safely issue the electronic invoice.
In order to solve the above problems, the present invention provides a method for generating an electronic invoice, the method comprising:
acquiring data information of an electronic invoice to be issued, wherein the data information comprises an invoice identifier of the electronic invoice to be issued;
selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice drawing identifier;
filling the data information into the electronic invoice layout file template to obtain an electronic invoice file;
acquiring electronic seal data of an electronic invoice to be issued based on the mark issuing identification;
and performing a signature on the electronic invoice file through the electronic seal data to generate an electronic invoice comprising the electronic seal data.
Preferably, the method comprises the following steps: and acquiring data information of the electronic invoice to be issued based on the Java interface.
Preferably, the method comprises the following steps: the electronic invoice is an OFD electronic invoice.
Preferably, the method comprises the following steps: and establishing data indexing of the data information of the OFD electronic invoice.
Preferably, the electronic invoice file is signed through the electronic seal data to generate a seal;
the appearance or stamping area of the stamp is associated with the electronic stamp data.
Preferably, the method comprises the following steps: and setting the electronic invoice accessory, wherein the electronic invoice accessory comprises the background information of the electronic invoice.
Preferably, the populating the data information into the electronic invoice layout file template includes:
and determining the coordinates, fonts and word sizes of the data information and the alignment mode of the data information according to a calculation rule.
Preferably, the electronic invoice layout file template includes:
the electronic value-added tax general invoice template, the electronic special invoice template for the value-added tax of each province in the country and the electronic general invoice template for the toll road toll value-added tax of each province in the country.
Based on another aspect of the invention, the invention provides a system for generating an electronic invoice, the system comprising:
the system comprises an initial unit, a receiving unit and a processing unit, wherein the initial unit is used for acquiring data information of an electronic invoice to be issued, and the data information comprises an invoice identifier of the electronic invoice to be issued;
the selection unit is used for selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice drawing identifier;
the acquisition unit is used for filling the data information into the electronic invoice layout file template to acquire an electronic invoice file; acquiring electronic seal data of an electronic invoice to be issued based on the mark issuing identification;
and the generating unit is used for signing the electronic invoice file through the electronic seal data to generate the electronic invoice comprising the electronic seal data.
Preferably, the initial unit is further configured to: and acquiring data information of the electronic invoice to be issued based on the Java interface.
Preferably, the method comprises the following steps: the electronic invoice is an OFD electronic invoice.
Preferably, the generating unit is further configured to: and establishing data indexing of the data information of the OFD electronic invoice.
Preferably, the generating unit is further configured to: signing the electronic invoice file through the electronic seal data to generate a seal; the appearance or stamping area of the stamp is associated with the electronic stamp data.
Preferably, the generating unit is further configured to: and setting the electronic invoice accessory, wherein the electronic invoice accessory comprises the background information of the electronic invoice.
Preferably, the obtaining unit is configured to fill the data information into the electronic invoice layout file template, and includes:
and determining the coordinates, fonts and word sizes of the data information and the alignment mode of the data information according to a calculation rule.
Preferably, the electronic invoice layout file template includes:
the electronic value-added tax general invoice template, the electronic special invoice template for the value-added tax of each province in the country and the electronic general invoice template for the toll road toll value-added tax of each province in the country.
The technical scheme of the invention provides a method and a system for generating an electronic invoice, wherein the method comprises the following steps: acquiring data information of an electronic invoice to be issued, wherein the data information comprises an invoice identifier of the electronic invoice to be issued; selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice identifier; filling data information into an electronic invoice layout file template to obtain an electronic invoice file; acquiring electronic seal data of an electronic invoice to be issued based on the issuing identification; and performing a signature on the electronic invoice file through the electronic seal data to generate an electronic invoice comprising the electronic seal data. The technical scheme of the invention discloses a method and a system for generating an electronic invoice, which are used for calling a matched electronic invoice layout file template in an electronic invoice template library after electronic invoice data are acquired, so as to directly generate the electronic invoice, improve the efficiency of acquiring the electronic invoice and improve the use experience of a user.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method for generating an electronic invoice according to a preferred embodiment of the invention;
FIG. 2 is a flow chart of a method for generating an electronic invoice according to a preferred embodiment of the invention; and
fig. 3 is a block diagram of a system for generating an electronic invoice according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method for generating an electronic invoice according to a preferred embodiment of the invention. The method comprises the steps of receiving electronic invoice data based on a Java interface form, selecting a matched electronic invoice format file template according to an invoicing identifier, filling the electronic invoice data into the matched OFD electronic invoice format file template according to a preset format, and generating a corresponding OFD electronic invoice. The OFD electronic invoice format file template is in a plurality of preset formats and comprises value-added tax electronic common invoices of nationwide provinces, value-added tax electronic special invoices of nationwide provinces and toll road toll value-added tax electronic common invoices of nationwide provinces.
As shown in fig. 1, the present invention provides a method for generating an electronic invoice, the method comprising:
step 101: acquiring data information of an electronic invoice to be issued, wherein the data information comprises an invoice identifier of the electronic invoice to be issued; preferably, the method comprises: and acquiring data information of the electronic invoice to be issued based on the Java interface.
The invention receives the electronic invoice data based on the Java interface form, which at least comprises the following steps: the invoice code, the invoice number, the name of a purchaser, the taxpayer identification number, the purchaser's account line and account number, the amount, the name of a seller, the seller's taxpayer identification number and the seller's account line and account number; the billing identification comprises: an invoice code and an invoice number.
Step 102: selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice identifier; preferably, the electronic invoice layout file template comprises: the electronic value-added tax general invoice template, the electronic special invoice template for the value-added tax of each province in the country and the electronic general invoice template for the toll road toll value-added tax of each province in the country.
According to the invoice identifier, the matched electronic invoice layout file template is selected, the template is analyzed, the invoice data coordinates, the invoice data font, the word size, the invoice data alignment mode and the like are calculated according to a certain rule, and the electronic invoice data are filled into the template.
Step 103: filling data information into an electronic invoice layout file template to obtain an electronic invoice file; preferably, the populating the data information into the electronic invoice layout file template includes: and determining the coordinates, the font size and the alignment mode of the data information according to the calculation rule.
The calculation rules comprise a series of format specifications which are set by the State tax administration aiming at the electronic invoice format file, including the absolute position, the relative position, the alignment mode, the folding mode of the face content, the font size and the like. If the filling area width of the item of the 'item name' is 50mm, the font requires Song style, the alignment mode is left alignment and vertical centering, the font size is 5.5-9pt, and the folding rule is as follows: when n is less than or equal to 31, the character number is 9pt, and the line is not folded; when n is more than 31 and less than or equal to 35, the character number is 8pt, and the line is not folded; when n is more than 35 and less than or equal to 40, the character number is 7pt, and the line is not folded; when n is more than 40 and less than or equal to 47, the character number is 6pt, and the line is not folded; when n is more than 47 and less than or equal to 51, the character size is 5.5pt, and the line is not folded; when n is greater than 51, the font size is 5.5pt, and the line is folded after the 50 th or 51 th character.
Step 104: and acquiring electronic seal data of the electronic invoice to be issued based on the mark issuing identification.
The invention obtains the matched electronic seal data according to the invoicing identification, and the electronic seal data comprises: electronic seal information and digital signature information.
Step 105: and performing a signature on the electronic invoice file through the electronic seal data to generate an electronic invoice comprising the electronic seal data. Preferably, the method comprises the following steps: the electronic invoice is an OFD electronic invoice. Preferably, the method comprises the following steps: and establishing data indexing of data information of the OFD electronic invoice. Preferably, the electronic invoice file is signed through electronic seal data to generate a seal; the appearance or stamping area of the stamp is associated with electronic stamp data. Preferably, the method comprises the following steps: and setting an electronic invoice attachment, wherein the attachment comprises background information of the electronic invoice.
The method verifies the validity of the electronic seal data, and when the electronic seal data is valid, the OFD electronic invoice is signed to generate the OFD electronic invoice containing the electronic seal data.
As shown in fig. 2, the embodiment of the invention discloses a method for generating an electronic invoice OFD layout file, which is used for calling a matched OFD electronic invoice layout file template in an OFD template library after acquiring electronic invoice data, so as to directly generate an OFD electronic invoice, thereby improving the efficiency of acquiring the OFD electronic invoice and improving the use experience of a user. The method stores OFD electronic invoice format file templates with various preset formats in an OFD template library in advance; acquiring electronic invoice data, wherein the electronic invoice data at least comprises an invoicing identification; acquiring a matched OFD electronic invoice layout file template from an OFD template library according to the invoicing identification; and filling the matched OFD electronic invoice layout file template with the electronic invoice data according to a preset format to generate a corresponding OFD electronic invoice. The invention is developed based on JAVA interface, has higher generation efficiency and stronger cross-platform applicability, thereby realizing better user experience.
The electronic invoice OFD file supports data indexing of invoice content information in the file, and is convenient for extracting invoice content from the file; the method is compatible with the existing paper invoices, supports reading and printing by reading software in a general format, and can obtain display/reading and printing experiences consistent with or similar to the existing mode; the electronic invoice data processing system has a complete electronic signature or digital signature mechanism, all data in a file are protected by electronic signature data or digital signatures, and any modification of an electronic invoice can be discovered; the appearance or specific area of the seal is associated with the electronic signature data or the invoice data in the file, so that the triggering verification is facilitated; the system comprises an attachment and an extension mechanism, and supports the inclusion of other background information related to the invoice in the form of the attachment; support the characters specified in GB 18030; is convenient for machine reading and human reading.
According to the embodiment of the invention, the OFD electronic invoice layout file template does not need to be stored in the OFD template library in advance, and the method is developed based on a JAVA interface, so that the generation efficiency is higher, the cross-platform applicability is stronger, and the user experience is better.
The embodiment of the invention provides an OFD generation method supporting high concurrency and high performance based on JAVA interface development, which has higher generation efficiency and stronger cross-platform applicability, thereby realizing better user experience.
Fig. 3 is a block diagram of a system for generating an electronic invoice according to a preferred embodiment of the present invention.
As shown in fig. 3, the present disclosure provides a system for generating an electronic invoice, the system comprising:
the initial unit 301 is configured to acquire data information of an electronic invoice to be issued, where the data information includes an invoice identifier of the electronic invoice to be issued; preferably, the initiation unit 301 is further configured to: and acquiring data information of the electronic invoice to be issued based on the Java interface.
The invention receives the electronic invoice data based on the Java interface form, which at least comprises the following steps: the invoice code, the invoice number, the name of a purchaser, the taxpayer identification number, the purchaser's account line and account number, the amount, the name of a seller, the seller's taxpayer identification number and the seller's account line and account number; the billing identification comprises: an invoice code and an invoice number.
The selection unit 302 is used for selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice identifier; preferably, the electronic invoice layout file template comprises: the electronic value-added tax general invoice template, the electronic special invoice template for the value-added tax of each province in the country and the electronic general invoice template for the toll road toll value-added tax of each province in the country.
According to the invoice identifier, the matched electronic invoice layout file template is selected, the template is analyzed, the invoice data coordinates, the invoice data font, the word size, the invoice data alignment mode and the like are calculated according to a certain rule, and the electronic invoice data are filled into the template.
The calculation rules comprise a series of format specifications which are set by the State tax administration aiming at the electronic invoice format file, including the absolute position, the relative position, the alignment mode, the folding mode of the face content, the font size and the like. If the filling area width of the item of the 'item name' is 50mm, the font requires Song style, the alignment mode is left alignment and vertical centering, the font size is 5.5-9pt, and the folding rule is as follows: when n is less than or equal to 31, the character number is 9pt, and the line is not folded; when n is more than 31 and less than or equal to 35, the character number is 8pt, and the line is not folded; when n is more than 35 and less than or equal to 40, the character number is 7pt, and the line is not folded; when n is more than 40 and less than or equal to 47, the character number is 6pt, and the line is not folded; when n is more than 47 and less than or equal to 51, the character size is 5.5pt, and the line is not folded; when n is greater than 51, the font size is 5.5pt, and the line is folded after the 50 th or 51 th character.
The acquiring unit 303 is configured to fill the data information into the electronic invoice layout file template to acquire an electronic invoice file; acquiring electronic seal data of an electronic invoice to be issued based on the issuing identification; preferably, the obtaining unit is configured to fill the data information into the electronic invoice layout file template, and includes: and determining the coordinates, the font size and the alignment mode of the data information according to the calculation rule. The calculation rules comprise a series of format specifications which are set by the State tax administration aiming at the electronic invoice format file, including the absolute position, the relative position, the alignment mode, the folding mode of the face content, the font size and the like. If the filling area width of the item of the 'item name' is 50mm, the font requires Song style, the alignment mode is left alignment and vertical centering, the font size is 5.5-9pt, and the folding rule is as follows: when n is less than or equal to 31, the character number is 9pt, and the line is not folded; when n is more than 31 and less than or equal to 35, the character number is 8pt, and the line is not folded; when n is more than 35 and less than or equal to 40, the character number is 7pt, and the line is not folded; when n is more than 40 and less than or equal to 47, the character number is 6pt, and the line is not folded; when n is more than 47 and less than or equal to 51, the character size is 5.5pt, and the line is not folded; when n is greater than 51, the font size is 5.5pt, and the line is folded after the 50 th or 51 th character.
The generating unit 304 is configured to generate an electronic invoice including the electronic seal data by signing an electronic invoice file through the electronic seal data. Preferably, the method comprises the following steps: the electronic invoice is an OFD electronic invoice. Preferably, the generating unit is further configured to: and establishing data indexing of data information of the OFD electronic invoice. Preferably, the generating unit is further configured to: signing an electronic invoice file through electronic seal data to generate a seal; the appearance or stamping area of the stamp is associated with electronic stamp data. Preferably, the generating unit is further configured to: and setting an electronic invoice attachment, wherein the attachment comprises background information of the electronic invoice.
The method verifies the validity of the electronic seal data, and when the electronic seal data is valid, the OFD electronic invoice is signed to generate the OFD electronic invoice containing the electronic seal data.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

Claims (16)

1. A method for generating an electronic invoice, the method comprising:
acquiring data information of an electronic invoice to be issued, wherein the data information comprises an invoice identifier of the electronic invoice to be issued;
selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice drawing identifier;
filling the data information into the electronic invoice layout file template to obtain an electronic invoice file;
acquiring electronic seal data of an electronic invoice to be issued based on the mark issuing identification;
and performing a signature on the electronic invoice file through the electronic seal data to generate an electronic invoice comprising the electronic seal data.
2. The method of claim 1, comprising:
and acquiring data information of the electronic invoice to be issued based on the Java interface.
3. The method of claim 1, comprising: the electronic invoice is an OFD electronic invoice.
4. The method of claim 3, comprising: and establishing data indexing of the data information of the OFD electronic invoice.
5. The method according to claim 3, said electronic invoice file is signed by said electronic seal data to generate a seal;
the appearance or stamping area of the stamp is associated with the electronic stamp data.
6. The method of claim 3, comprising: and setting the electronic invoice accessory, wherein the electronic invoice accessory comprises the background information of the electronic invoice.
7. The method of claim 1, the populating the data information to the electronic invoice layout file template, comprising:
and determining the coordinates, fonts and word sizes of the data information and the alignment mode of the data information according to a calculation rule.
8. The method of claim 1, the electronic invoice layout file template, comprising:
the electronic value-added tax general invoice template, the electronic special invoice template for the value-added tax of each province in the country and the electronic general invoice template for the toll road toll value-added tax of each province in the country.
9. A system for generating an electronic invoice, the system comprising:
the system comprises an initial unit, a receiving unit and a processing unit, wherein the initial unit is used for acquiring data information of an electronic invoice to be issued, and the data information comprises an invoice identifier of the electronic invoice to be issued;
the selection unit is used for selecting an electronic invoice layout file template matched with an electronic invoice to be issued based on the invoice drawing identifier;
the acquisition unit is used for filling the data information into the electronic invoice layout file template to acquire an electronic invoice file; acquiring electronic seal data of an electronic invoice to be issued based on the mark issuing identification;
and the generating unit is used for signing the electronic invoice file through the electronic seal data to generate the electronic invoice comprising the electronic seal data.
10. The system of claim 9, the initiation unit further to:
and acquiring data information of the electronic invoice to be issued based on the Java interface.
11. The system of claim 9, comprising: the electronic invoice is an OFD electronic invoice.
12. The system of claim 11, the generation unit further to: and establishing data indexing of the data information of the OFD electronic invoice.
13. The system of claim 11, the generation unit further to: signing the electronic invoice file through the electronic seal data to generate a seal;
the appearance or stamping area of the stamp is associated with the electronic stamp data.
14. The system of claim 11, the generation unit further to: and setting the electronic invoice accessory, wherein the electronic invoice accessory comprises the background information of the electronic invoice.
15. The system of claim 9, the obtaining unit to populate the data information to the electronic invoice layout file template, comprising:
and determining the coordinates, fonts and word sizes of the data information and the alignment mode of the data information according to a calculation rule.
16. The system of claim 9, the electronic invoice layout file template, comprising:
the electronic value-added tax general invoice template, the electronic special invoice template for the value-added tax of each province in the country and the electronic general invoice template for the toll road toll value-added tax of each province in the country.
CN202110943031.0A 2021-08-17 2021-08-17 Method and system for generating electronic invoice Pending CN113837818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110943031.0A CN113837818A (en) 2021-08-17 2021-08-17 Method and system for generating electronic invoice

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110943031.0A CN113837818A (en) 2021-08-17 2021-08-17 Method and system for generating electronic invoice

Publications (1)

Publication Number Publication Date
CN113837818A true CN113837818A (en) 2021-12-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110943031.0A Pending CN113837818A (en) 2021-08-17 2021-08-17 Method and system for generating electronic invoice

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Country Link
CN (1) CN113837818A (en)

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