When you come back, read the invoice on the IC card into the computer.
3. Edit the customer code and commodity code and input them into the computer.
4. Special VAT invoices can be issued.
note:
1. If there are more than one VAT invoice at a time, you must first calculate the quantity (that is, the amount and quantity of each invoice) and then enter it directly.
2. Before each invoice is issued, you must try to adjust it with other paper, and the generated ciphertext must enter the password area, otherwise the invoice authentication will not pass.
3. When affixing the special seal for finance or invoice, it must not be affixed to the serial number, otherwise the invoice authentication will not pass.