04 September 2017
You are deduct TDS on 31.03.2017 (March) Payable date 30.04.17. In case you can paid on April you don't want pay interest on the Deducted amount. You not paid on April.... You deposited 04/09/2017. So, We can calculate March 2017 to Sep 2017 (7months)
What would be for the period of 04.05.2016 to 31.03.2017. We made payment on 04.05.2016 without deduction of TDS. Will interest @ 1% be applicable for the period 04.05.2016 to 31.03.2017 for late deduction of TDS.
05 September 2017
Yes, u/s 201(1A)(i), Interest is payable @1% for every month or part there of from date on which tax is deductable to date on deduction (in your case May to Mar) Tax Amount * 11 Months *1% 201(1A)(ii), interest @ 1.5% for the every month or part there of from date of deduction to date of payment (Mar to Sep) Tax Amount *7 months * 1.5%