1. It is necessary to set the applicable tax rate of goods or services in the commodity code library in advance, find and select the correct tax rate of goods or services of the company in the system settings, and complete the invoice issuance after selecting the corresponding goods or services during invoicing. 2. The following aspects should be paid attention to when selecting tax classification codes: (1) The tax rate of some tax classification codes is inconsistent with the actual tax rate required by accounting, so you can call the tax classification codes first, and then modify the tax rate in the "Commodity Code Editing" interface; (2) Need to issue mixed goods, such as the name of the goods issued by the supermarket is food, but the actual goods are a series of goods such as bread, biscuits, milk, etc. The tax classification code cannot be called out together because of the detailed division. It is recommended that accountants fill in the name of the actual goods and then choose the corresponding tax classification code; (3) When choosing the tax classification code, it is necessary to judge whether it is selling goods or service industries, which is helpful to find in the category. It is suggested to search for keywords by retrieval first; (4) If the commodities to be issued are general terms, for example, the commodities issued by Company A are fixed assets, you can ask what the accounting specific fixed assets are, vehicles, office computers or others, and then search the tax classification code according to the specific commodity names.