Form / Return: GSTR-1

Due Date: 11 May 2026

Who It's For: Monthly GST filers turnover > ₹5 Cr, or opted monthly

Description: Outward supplies (sales) for April 2026       

                      Details of all B2B, B2C invoices, exports, debit/credit notes for April 2026

Late Fee / Penalty: ₹50/day (₹20/day for nil return), max ₹10,000