Tds refund

ISSUE : ASSESSEE DIDN'T FILE THE RETURN FOR                                                            RESPECTIVE AY NOW  HE WANT TO CLAIM REFUND

section 192 salary income and TDS amount is as follows :       

1. AY 2011-12   RS.  24,730

2. AY 2012-13   RS.  24,942                        

3. AY 2013-14   RS.  61,779                

TOTAL        RS.  1,11,451                                                            

Please explain the detailed process for claiming the refund.

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