Interest on late payment of tds

Kanthraju (Accountant) (29 Points)

05 September 2011  

Please suggest me to caliculate interest on late payment of TDS. For the month of Apr-11 rent (Accounted on 30/04/11) paid on 13th of May 2011. TDS deposited on 6th of July. Here what is the due date for payment of TDS? How many month interest to be paid to Govt of India?