If an old invoice has been checked, it is not allowed to be invalidated according to the regulations, but you can write a negative invoice to offset the amount of the invoice that was wrongly sent, and then re-write it correctly.

if the invoice has been checked, it can't be voided. You can write off a negative invoice across months. Invoices shall be voided under the following conditions:

1. Not within a month.

2. tax has not been copied.

3. Not certified.

if the tax has been checked, it means that the tax has been copied, which cannot be voided directly. Only red-ink invoices can be issued. Invoice refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities. It is the original basis of accounting and an important basis for law enforcement inspection by audit institutions and tax authorities.