Last date for GSTR1 for the month of August, Sept and Oct

https://cbec-gst.gov.in/pdf/central-tax/notfctn-58-central-tax-english.pdf

https://cbec-gst.gov.in/pdf/central-tax/notfctn-57-central-tax-english.pdf

31st December 2017

For aggregate turnover upto Rs. 1.50 crores -

Last date for filing return from July to Sep - 31.12.2017

                                        from Oct to Dec. - 15.02.2018

For aggregate turnover of more than Rs. 1.50 crores -

Last date for filing return from July to Oct. - 31.12.2017

                                                           Nov. - 10.01.2018