insert the billing tax control panel on the computer.

enter the login interface of tax-controlled invoicing software for value-added tax invoices, enter your password, click Login, click Settings/Commodity Add, enter rice flour oil, click "Assign Code" in the upper right corner, search and pop up the detailed tax code of food, and click "Submit".

If the invoice is issued by a small-scale taxpayer, first provide the tax authorities with business license, tax registration certificate, name, quantity, amount, description, unit and other contents; If it is a temporary operation, it should bring the temporary operation certificate, my ID number, the name of the other party and so on. The contents required on the invoice shall not be left blank.