Wrong date of invoice

You cannot post-date a filed invoice via Table 9A amendments on the GST portal. To correct this, issue a Credit Note against the July entry (27-07-2026) in Table 9B to nullify the liability, and report the actual invoice (09-08-2026) as a fresh entry in the August GSTR-1. The tax liability will automatically reconcile in your GSTR-3B.

Thanks a lot for the reply. But the GSTR1 TABLE 4A, turns red when I enter the same invoice number and doesn't process