Important dates of April, 2019 for compliance under GST are as follows:-
| Due date | Forms | Period | Description |
| April 10, 2019 | GSTR-8 | March 2019 | E-Commerce operator registered under GST liable to TCS |
| April 10, 2019 | GSTR-7 | March 2019 | TDS Return |
| April 11, 2019 | GSTR-1 | March 2019 | Outward Supply Return (Taxpayer having turnover of more that Rs. 1.50 crores or opted to file monthly Return) |
| April 13, 2019 | GSTR-6 | March 2019 | Input Service Distributor Return |
| April 20, 2019 | GSTR-3B | March 2019 | Summary Return (All registered Persons to pay GST and file Monthly GST Return) |
| April 20, 2019 | GSTR-5 | March 2019 | Non-resident foreign Taxpayer Return |
| April 20, 2019 | GSTR-5A | March 2019 | Non resident ODIAR services provider Return |
| April 30, 2019 | GSTR-1 | Jan -Mar 2019 | Outward Supply Return (Taxpayer having turnover of up to Rs. 1.50 crores or opted to file Quarterly Return) |