| Compliance | Due Dates | Forms |
| Due date for filing return by the e-commerce operators required to deduct TDS under GST for the m/o Aug 2019. | 10.10.2019 | GSTR-8 |
| Due date for filing return by the person who is required to deduct TDS under GST for the m/o Sep 2019. | 10.10.2019 | GSTR-7 |
| Due date for filing return for m/o Sep 19 (Applicable for taxpayers with Annual Aggregate turnover Above Rs. 1.50/- Crore or opted to file monthly Return | 11.10.2019 | GSTR-1 |
| Due date for filing return by Input Service Distributor for m/o Sep 19. | 13.10.2019 | GSTR-6 |
| Due date for filing return by Composition Dealer for Sep 19 Quarter. | 18.10.2019 | CMP 08 |
| Due date for filing return by the Non-Resident taxable person & OIDAR for the m/o Sep 19. | 20.10.2019 | GSTR-5 & 5A |
| GSTR Return for the m/o Sep 19. (Payment of taxes) | 20.10.2019 | GSTR-3B |
| Due date for filing return for Sep Quarter (Applicable for taxpayers with Annual Aggregate turnover upto Rs. 1.50/- Crore) | 31.10.2019 | GSTR – 1 |
| Application for refund | 18 months after the end of the quarter for which refund is to be claimed | RFD-10 |
