Tds for march 2012 to file in may 2012 (tds return filed)

My cilent has made of provsion for expense of 300000 In 25March 2012 which is liable to deduct TDS u/s 194C @ 2% i.e 6000

Now i want to deposit TDS in May 2012 with interest. i.e rs 90

TDS Return for Jan-March 2012 i.e AY 2012-13 already filed on May 1, 2012.

My question is while Deposting challan 281 which AY is to mention in challan. and can i revised return which is filed on May 1,2012?