Check the tax code online. The query process of tax classification code is to double-click to open the billing software-find the commodity code-select the tax classification code of goods and services-find the query criteria and enter the name of the commodity to be searched-in the searched tax classification code, you can see the category code to which the commodity belongs. Tax classification code refers to the tax classification and code of goods and services. In the upgraded version of VAT invoice, the goods on the taxpayer's face should be associated with the tax code approved by State Taxation Administration of The People's Republic of China, and the invoice should be issued according to the tax rate and collection rate indicated in classification code. It can also enable tax authorities to count, screen, analyze and compare data, with the ultimate goal of strengthening tax collection management.

Detailed Rules for the Implementation of the Measures for the Administration of Invoices in People's Republic of China (PRC)

Article 4

The basic contents of an invoice include: invoice name, invoice code and number, number and purpose, customer name, bank and account number, commodity name or business item, unit of measurement, quantity, unit price, amount in words and figures, drawer, invoice date, name (seal) of billing unit (individual), etc.

The tax authorities at or above the provincial level may determine the specific contents of invoices according to the needs of economic activities and invoice management. Article 27

After the invoice is issued, if the red-ink invoice is needed for sales return, the original invoice must be recovered and marked invalid or valid proof from the other party must be obtained.

After issuing the invoice, if there is any sales discount, the original invoice must be recovered and marked invalid before issuing the sales invoice again, or the red-ink invoice must be issued after obtaining the valid certificate from the other party.