If you've missed filing some invoices for June 2020 in your GSTR-1, you can still include them in your September return. Crucially, if these invoices were already declared in your GSTR-3B, you won't need to pay any interest. However, if they weren't declared in GSTR-3B, interest may be applicable.
08 October 2020
what will be consequences if some invoices for June 2020 inadvertently missed to File in GSTR-1 . but in September return , i want to show in GSTR-1.