Important dates of May 2019 for compliance under GST are as follows:-
| Due date | Forms | Period | Description |
| May 10, 2019 | GSTR-8 | April 2019 | TCS Return (Statement for tax collection at source) |
| May 10, 2019 | GSTR-7 | April 2019 | TDS Return (Return for Tax Deducted at Source) |
| May 11, 2019 | GSTR-1 | April 2019 | Return of outward supplies of taxable goods and/or services, [Taxpayer having a turnover of more than Rs. 1.50 crores] Monthly Return |
| May 13, 2019 | GSTR-6 | April 2019 | Every Input Service Distributor (ISD) |
| May 20, 2019 | GSTR-3B | April 2019 | All registered Persons to pay GST and file Monthly GST Return |
| May 20, 2019 | GSTR-5 | April 2019 | Outward taxable supplies and Tax payable by Non-resident person |
| May 20, 2019 | GSTR-5A | April 2019 | Outward taxable supplies and Tax payable by OIDAR services provider |