GSTR-1 filing deadline extended for certain high-turnover taxpayers to the next month's fixed due date. Extends the time limit for furnishing details of outward supplies in FORM GSTR-1 by registered persons with aggregate turnover exceeding more than 1.5 crore rupees for each month from July 2019 to September 2019 until the eleventh day of the month succeeding such month, under the second proviso to sub-section (1) of section 37 read with section 168 of the West Bengal Goods and Services Tax Act, 2017; time limits under sections 38(2) and 39(1) for the same months shall be notified subsequently.