20 April 2011
These are details of other payments made. Any payment of interest, penalty, old arrears and outstanding or any other payments. These details are provided in 4A(d) of ST-3 and the details of Challan, etc. are the source documents to be filled in at 4B.
4C of ST-3 is a declaration by the assessee that the tax due on the returned amount has not yet been paid and the same will be subsequently filed. This is necessary because the Memorandum of Self Assessment signed at the end of ST-3 states "I/We have paid the duty within the specified time limit and in case of delay, I/We have deposited the interest leviable thereon".