GSTR-1A is an optional return allowing taxpayers to amend supply records reported in GSTR-1 or add new supply records for the same tax period. Filing GSTR-1A is permitted after filing GSTR-1 but before filing GSTR-3B for the relevant month.
GSTZen provides an efficient platform to manage and file GSTR-1A seamlessly. Follow the steps below to complete your GSTR-1A filing through GSTZen.
Step 1: Select the GSTIN
- Log in to GSTZen and navigate to the GSTIN for which you wish to file GSTR-1A.

Step 2: File GSTR-1A
- Click on File GST Returns.
- Choose GSTR-1A and select the relevant tax period.
- You can file the return using OTP-based authentication.

Step 3: Upload Your Sales Register
- Upload your sales register using either:
- XLSX file upload, or
- GSTR-1 JSON
- While uploading, ensure:
- The column “Is this invoice for GSTR-1A” is marked as “Y” or “N” for relevant invoices.
- Proper mapping is done while uploading the Excel file to GSTZen.

Step 4: Enter Details of Documents Issued
- Fill in the details under the Documents Issued section as required.

Step 5: Upload or Calculate HSN/SAC Summary (Optional)
- If your uploaded sales invoices already contain HSN/SAC details:
- The summary will be automatically generated when you calculate the GSTZen Summary.
- If not:
- Upload an HSN/SAC Summary through the Upload HSN/SAC Summary XLS option.

Step 6: Calculate GSTZen Summary
- Generate the summary to review the compiled sales and HSN/SAC data.
Step 7: Upload GSTR-1A to the GST Portal
- Upload your return to the GST portal directly from GSTZen.
- Generate the portal summary for verification.

Step 8: Review Government Portal Summary
- Carefully review the GSTR-1A summary on the GST portal to ensure that all amendments and additions are accurately reflected.
Step 9: File the Return
- File your GSTR-1A using either:
- Electronic Verification Code (EVC), or
- Digital Signature Certificate (DSC).

Important Note
Once the GSTR-1A return is submitted, it cannot be edited or revised.
Please thoroughly verify all details before final submission to avoid any discrepancies.
