01 May 2012
In my opinion as per Point of Taxation RUles:
(1) Although service is rendered in March 12 but since invoice is raised in Apr. 12, the applicable rate is 12%+ (2%+ 1% as Cess)
(2) Return Period is Ist Half Apr. Sep 2012 since liability to pay service tax arises in month of Apr. 2012 and due date for payment of service tax will be 5 th of May 2012
01 May 2012
I agree with CA Nikhil Jhawar's view. Its always better to raise Invoice as soon as the Service is provided. The amount is recorded/accounted only when the invoice is raised.
As the invoice has been issued in April 2012 , it will be covered under the Ist half Yly Return of FY 2012-13.