| 10-May | Fri | GSTR-7 (Monthly) |
| 10-May | Fri | GSTR-8 (Monthly) |
| 11-May | Sat | GSTR-1 (Monthly) |
| 13-May | Mon | B2B Outward Supplies for QRMP (IFF) |
| 13-May | Mon | GSTR-5 (Monthly) |
| 13-May | Mon | GSTR-6 (Monthly) |
| 20-May | Mon | GSTR-5A (Monthly) |
| 20-May | Mon | GSTR-3B (Monthly) |
| 25-May | Sat | PMT-06 (for QRMP) |
| 28-May | Tue | GSTR-11 |
| 30-May | Thu | ITC-03 |