What Is GSTR-1A?
GSTR-1A is an optional amendment facility that allows specified corrections or missed outward-supply details for the same tax period before filing GSTR-3B.
Quick Answer
GSTR-1A is an optional amendment facility that allows specified corrections or missed outward-supply details for the same tax period before filing GSTR-3B.
GSTR-1A is an optional amendment facility on the GST Portal. It can be used to amend certain records already reported in GSTR-1 or add records missed from the same tax period.
Practical GST Workflow
- Maintain complete sales and purchase records.
- Reconcile return data with books and source documents.
- Review exceptions such as credit notes, amendments and ITC restrictions.
- File the applicable GST return and retain supporting records.

