Extension of GSTR-1 filing deadline for specified taxpayers to the eleventh day following each month. The Commissioner, on the Council's recommendation and under delegated statutory authority, extends the due date for furnishing details of outward supplies in GSTR-1 for registered persons whose aggregate turnover exceeds the applicable threshold in the preceding or current financial year, by fixing the last date for the months April, May and June to the eleventh day of the month succeeding each such month; deadlines for returns under the related return provisions will be notified subsequently in the Official Gazette.