If you book tds liability in april, as you have not made provision of tds in march, u need to pay interest for DELAY IN DEDUCTION of tds @ 1% p.m. but interest for DELAY IN PAYMENT of tds will not arise if u make payment on the same day on which you book the tds liability.
If you have not received the invoice/amount of invoice not known/provision for expense not made and you r recoding the transaction in april, then yes due date is 07th May.
But if provision for expense had been made in march but tds was not provided in march and you are recording tds in april then due for payment is 30th april and if u make payment on or before 30th april no interest on payment will be required but still interest for delay in deduction would arise. This is bcoz u have made provision in march, even if exact value is not know/party is not known/transaction recorded in suspense account etc.
But in this case u had made provision for exp in march, recorded tds in april (means deducted tds in april) so interest for delay in deduction would arise. This is bcz u have made provision for expense in march but not deducted tds as u didn't know the exact value and now deducting it in april, so liability will arise from march.
Okay Noted Lotus. What if one client didn't provide TDS for all the 15 vendors that he has put in provsion list. out of 15- 6 are 194J, 6 are 194c, 3 are 194I...Now how interest on delay will be charged ? if they deducted in April 2021
Interest will be calculated @ 1% on the AMOUNT OF TDS. you can calculate it separately for each transaction or collectively for all transactions. It will not make any difference. different sections have no relevance here.