12 September 2025
Any registered taxpayer who has filed GSTR-1 and notices a discrepancy or error can correct it by filing GSTR-1A for the same period. GSTR-1A can be filed after submitting GSTR-1 but only before submitting GSTR-3B of the same tax period. You can update, add, or modify invoice details; correct typographical errors; and address missing records. However, you cannot correct GSTINs—those changes must be made in the next period’s GSTR-1.