All the above solution would fail. TDS deducted for AY 2011-12 could not be cliamed as a refund in AY 2012-13. You should do the following:
1. dont do anything for A.Y. 2012-13 as it is 100% correct if you see for 1 year information.
2. File online rectification for A.Y. 2011-12 against the intimation u/s 143(1) claiming a refund. It was CPC's responsiblity to admit TDS (based on 26As information) although you forgot to claim it while filing returnn in AY 2011-12.
There could be 2 consequences. viz:
a. Your refund will be granted without any hastle iwithin few months, chances of which are very high;
b. or, the CPC may refer your case to jurisdictional AO. then you should approach himwith form 16A and he will grant you the refund after being satisfied.
P.S. before proceeding just confirm that your 26As reflects the TDS amount for AY 2011-12
Regards,
Ankit Agarwal
ankitagarwal130986 @ gmail.com