Payment of penalty for delay in filing service tax return

I have to file a service tax return for the period October 2011 to March 2012. Since the return is filied after due date, I have to pay the penalty or Rs. 1,000/-.

Kindly clarify the following points.

1) Under which head the penalty is to be paid ?

2) How to show the challan details in the return ( in return only one column is provided to show the challan details for Jan to March tax payment)

Thank You.

Uday.