GST Return Summary Guide: Preparing GSTR-1 and GSTR-3B Reconciliation Data

Fast Answer: GSTR-1 vs GSTR-3B Reconciliation

Filing monthly GST returns requires tracking two key submissions:

• GSTR-1: Statement of outward supplies (sales invoices, debit notes, export details). Filed by the 11th of the succeeding month.
• GSTR-3B: Monthly self-assessed summary return for payment of net tax liability (Outward Tax minus Input Tax Credit). Filed by the 20th of the succeeding month.

Any mismatch between GSTR-1 sales figures and GSTR-3B tax paid triggers automated system notices under Section 73/74 of the CGST Act.

Use the GST Return Summary Tool on Tools24Now to group invoices by B2B, B2C Large, and B2C Small tables before uploading to the GST portal.

Essential Steps Before Monthly Filing

1. Segregate B2B vs B2C: B2B sales with buyer GSTIN numbers must be reported invoice-by-invoice. Intra-state B2C sales can be aggregated by rate slab.
2. Reconcile E-Way Bills & E-Invoices: For businesses above threshold limits, cross-reference generated IRN (Invoice Reference Number) codes.
3. Verify HSN/SAC Summary: Ensure mandatory 6-digit or 8-digit HSN codes match your taxable turnover brackets.