What should I do if I have to make up the tax invoice after I have not issued it?

1) If there is income that has been booked and needs to be invoiced later, you can first reverse the bookkeeping voucher when posting, and then re-invoice the income without handling the cost.

2) Make appropriate adjustments in the tax control system to offset non-ticketing income and increase billing income.

That is, when the VAT is declared, the corresponding negative number is filled in for the unbilled income and the corresponding positive number is filled in for the invoiced income. Then the actual return of the reaction is negative and positive.

I hope I can help you.