Extension of Time for GST TDS return filing granted; deadline administratively extended for specified months. The Commissioner of State Tax for Tamil Nadu has extended the time limit for furnishing returns in Form GSTR-7 by registered persons required to deduct tax at source under section 51, under the authority of the Tamil Nadu Goods and Services Tax Act and Rules. The extension covers the monthly TDS returns for the months of October through December 2018, with the filing deadline moved to the later date specified by the Commissioner under section 39 and rule 66.