No extension of last date for filing GSTR-1 for July, 2017 No extension of last date for filing GSTR-1 for July, 2017 The last date for filing GSTR-1 for the month of July, 2017 is 10th October, 2017. http://india-gst.in/no-extension-of-last-date-for-filing-gstr-1-for-july-2017/