as per the press Release ;- "The time period for filing GSTR-2 and GSTR-3 for the months of July, 2017 to March 2018 would be worked out by a Committee of Officers. However, filing of GSTR-1 will continue for the entireperiod without requiring filing of GSTR-2 & GSTR-3 for the previous month / period"
But i think still there is no clarification regarding the filing of GSTR-2 July17. I suggest to file the GSTR-2 for July17 as we have 13 more days to file the return. Last date for filing GSTR-2 (july) is 30th November 2017. And please refer www.gst.gov.in site shows the last date for GSTR-2, rest are 'TBU - To Be Updated' So its better to file for July17.