To quickly find the correct tax classification code for your invoices, you can navigate through the Public Services section, then select Promotional Guidance, followed by the Tax Knowledge Base module.

Next, type "Invoice Management Relevant Matters" into the search bar at the top of the page and hit the Search button. From the results, look for the official announcement with the document number "State Administration of Taxation Announcement No. 45 of 2017." Once you open this announcement, scroll down to the very bottom of the page and click to download the attached file titled "Commodity and Service Tax Classification Code Table."

After downloading, open the file and use its search function to locate the specific product category you need for invoicing. For instance, if you search for "Apple," you will promptly pinpoint the corresponding commodity classification abbreviation and its tax code within the table.

For direct access, you can also use the provided topic link for further assistance.