18 January 2012
1] The rate of interest is 18% p.a. w.e.f. 01.03.2011, for prior period the rate was 13% p.a.
2] You need to make payment against excise accounting code No. - 00380087 Misc Receipts for Excise
3] The service tax interest payment differs for each service.
4] First calculate the no. of delay days i.e. if the payment was due on 06/12/2011 and you have paid duty on 10/12/2011 Then the delay days shall be 3 days [i.e. 07/12 to 9/12].