How to claim refund in tds done without pan

YOU HAVE TO FILE RETURN BY CLAIMING RETURN

BEFOR FILLING RETURN YOU HAVE TO TAKE TDS CERTIFICATE FROM DEDUCTEE.

AT THE TIME OF PROCESSING YOUR RETURN BY INCOME TAX AUTHORITIES IF CLAIM OF TDS IS NOT MATCHING WITH YOUR 26AS THE THEY WILL SEND LETTER TO YOU ASKING FOR CLERIFICATION AND ORIGINAL TDS CERTIFICATE.

AFTER THIS THEY WILL GRANT REFUND TO YOU.

Inform the deductor about your PAN and request to file revise TDS return then you can claim TDS refund.

In A/Y2011-12, in spite of my repeated requests, I did not get my TDS Certificate from Deductor.  I filed my return just before 31 july 2011(due date) . I included the  gross amount in my return,but could not claim the TDS amount for want of TDS Certificate. I  paid full tax,ignoring tds amount that was really due to me. Much later,Deductor sent me TDS Certificate d/d 23/09/2011 (handed over to me in October 2011). Not knowing TDS matters much,I was struggling to find out from different people how to claim this amount.On advice, I was about to raise a revised Return,when I received Refund by ECS on 09/12/2011(surprisingly fast that year). That refund did not cover this TDS amount even thoughi it  is shown in Form 26AS as having been booked on 24/09/2011,may be because I had not claimed.   I  was told that Revised Return is possible before31/03/2012 or Refund date  whichever earlier.That TDS certificate is still with me unclaimed.  Is it possible to claim this in my return for A/Y2012-13 ?