With reference to official twitter handle of Ministry of Finance, the last date for filing GSTR-2 & GSTR-3 for the month of July 2017 has been extended to November 30, 2017 and December 11, 2017 respectively.
A notification will be issued shortly for the same.
Last date for filing GSTR-2 was October 31, 2017 and for filing GSTR-3 is November 10, 2017.