In accordance with the provisions of the State Administration of Taxation, invoices need to be issued and certified within a certain period of time, if more than the specified time, then the invoice is expired, can not be reissued. Only the invoice of the month can be reopened, the invoice issued in the month has not been certified grass can be voided, voided, the original invoice is equivalent to the original invoice is not open, you can re-issue the correct invoice; if the invoice is across the month or has been certified invoices, can not be voided, only red invoice flushed back.