Click Invoice Management-Invoice Filling-VAT Ordinary Invoice Filling-Double-click the invoice code and number to confirm filling. 2. Fill in the buyer's information: When the seller issues an ordinary VAT invoice for the buyer (enterprise), it should fill in the buyer's taxpayer identification number or unified social credit code in the column of "Buyer's taxpayer identification number". 3. Tax-included status selection: enter the invoice filling interface, first confirm the tax-included status of your invoice, and then press "Price" to switch. 4. Method of adding and setting commodity codes: Click System Settings-Commodity Codes-Fill in the contents marked with * correctly, and click Save in the upper left corner. 5. Tax Rate: select the actual invoicing tax rate (tax rate will be automatically generated after selecting the tax classification code, but the tax rate may be incorrect, so you can modify it to the correct tax rate yourself), that is, 0. 6. Issue an invoice with a list: after filling in the invoice, click the "List" button and enter the commodity name. General taxpayers use this function when the list items exceed 8 lines.