Filling ITR of AY 2014-2015, AY 2013-2014, AY 2012-2013

Online filling had been disabled, but try the paper return and manual submission with the department. If there is any refund take benefit of circular 9/2015

Now you can not file for any of above asked years.

Note: this applies in general case only.

Exceptionally there is a very tedious procedure in which you can file after due approval from CIT.