Extension of GST return filing deadlines clarifies revised schedules and monthly GSTR-3B filing obligations for subsequent months. Revised filing deadlines for July 2017 GST returns: GSTR-1 for July 2017 is extended to 10 October 2017 with an earlier date for taxpayers above the turnover threshold; GSTR-2 and GSTR-3 for July 2017 have later revised due dates; August 2017 due dates to be notified. GSTR-3B will be filed monthly for August-December 2017, with each month's return due on the twentieth day of the following month.