Query about due dates

The due dates for filing returns are: 1st Half Year - 15th October 2nd Half Year - 15th April The due dates for payment of taxes are: For Corporates - 5th of every month/31st for the month of March For Non-Corporates - 5th of month following the quarter, i.e., 5th of July, October, January and 31st of March.

Please have my query

a bill of service tax received in second half of FY 2012 & return is to be filed for the same. 

How ever the payment against such purchase invoice made after 31.3.12

The input credit against such invoice can take for such invoice

UPEN