Due date extension for GSTR-1 returns for high-turnover taxpayers: monthly filings permitted until the eleventh day following each month. Extension of the due date for furnishing details of outward supplies in Form GSTR-1 is prescribed for registered persons with aggregate turnover above the threshold, allowing submission for each month from October 2019 to March 2020 up to the eleventh day of the succeeding month. The related time-limit for the corresponding return under the separate reporting provision will be notified later in the Official Gazette.