Tax classification code means that in the upgraded version of VAT invoice, the goods on the face of the taxpayer should be associated with the tax code approved by the State Administration of Taxation, and the invoice should be issued according to the tax rate and collection rate indicated on the classification code. Tax classification code refers to the identity number of goods, commodities, taxable services and service categories. The tax rate of the tax classification code part is inconsistent with the actual tax rate required by accounting. You can call the tax classification code first, and then modify the tax rate in the "Commodity Code Editing" interface. When choosing a tax classification code, you should first judge whether it is a commodity or a service industry, which will help you find it in the category. It is recommended to search for keywords by search first (don't enter the full name). For example, if a commodity shelf resident sheet is issued, the reduced range of the shelf can be retrieved.