first of all, explain that the invoice obtained by the customer is invalid

1. If the invoice of 486 is blank

1, if the invoice of 486 is still blank, just type another one with 486 directly.

2. Communicate with the customer and ask the customer to return the wrong invoice and exchange it for the correct invoice

3. Put 496 in the tax control machine.

2. 486 has been printed as an invoice of another bank number

1. If it is the invoice of the current month, it can be cancelled and reopened directly. If it is a cross-month, it is necessary to issue a red-ink invoice and issue another ticket.

2. contact the customer to exchange tickets.