234 a

Please some one help me regarding this

My assessee is a company ,we filed original return in time for A Y 2011-12 in which we claimed refund

Now we want to revise the return with Tax payable (tax not paid yet)

Is 234A applicable in case of revised return?

If not ,What is the reason that, when we  enter data in ITR 6 and Caculate Tax , 234 A is automatically filled,we gave details like Revised Return and date and Acknowledgement no. of original return which are necessary

Thank U.