Step 1: log in to the electronic tax bureau; Step 2: Choose to download OFD VAT invoice reader and download VAT invoice invoicing software (tax UKey version); Step 3: Download and install, insert into the UK, open the VAT billing software, and log in to the account. Step 4: 1. Insert the tax-controlled Ukey login billing software, and click the menu item "System Settings/Basic Code Settings/Custom Commodity and Service Codes" to open the "Commodity Code" window for editing. Step 5: Click Invoice-Select VAT invoice. Step 6: Fill in the information of the drawer and the name of the goods, pay attention to modify the payee and approver, issue, upload and save. Step 7: Download and print the invoice.