Partner
1072 Points
Joined December 2009
Normally amendment is allowed up to due date of filing of GSTR 3B for Sept next to close of the FY to which Invoice relates.
But you please try to amend the same while filing next GSTR1, you may succeed but changes may not affect receiver party.
It may appear in GSTR2B of receiver but since GSTR9 may have been filed by it.