Central Board of Excise & Customs had issued Notification No. 72/2017– Central Tax and Notification No. 18/2018-Central Tax and extended the time for filing details of outward supplies in Form GSTR-1 for certain months as specified in the table below for such class of registered persons having aggregate turnover of more than INR 1.5 crore in the preceding financial year or in the current financial year –
| Sl. No. | Months for which the details in FORM GSTR-1 are furnished | Due date |
| 1 | March, 2018 | 10th May, 2018 |
| 2 | April,2018 | 31st May, 2018 |
| 3 | May,2018 | 10th June, 2018 |
| 4 | June,2018 | 10th July, 2018 |
