The specific operation is as follows:

1. Insert Baiwang's tax control panel into the USB interface of the computer to enter the billing software system.

2. click "system settings" to enter the commodity code and select "goods and services tax classification code".

3. enter the "commodity coding" interface, and click the plus sign above on the left to add a new folder, which is convenient for managing all commodity names.

4. Then click the "Add" icon in the upper right corner.

5. finally fill in the product name/specification/unit and click "save".