All tax deductions for September 2017 need to be deposited latest by 7th October 2017.
Filing of TDS Returns for the quarter ended September 2017 (FY:2017-18 Quarter 2) is already under way since 1st October and the last date for filing TDS Returns is 31st October 2017.
Last date for filing TCS return is 15th October and last date for issue of TCS certificate 30th October.