The CBIC has prescribed the due date for the monthly GSTR 1 in case of the taxable persons who are required to file their GSTR 1 monthly. The due dates are as follows:-
| Months | Due date |
| October 2019 | 11th November 2019 |
| November 2019 | 11th December 2019 |
| December 2019 | 11th January 2020 |
| January 2020 | 11th February 2020 |
| February 2020 | 11th March 2020 |
| March 2020 | 11th April 2020 |

