You can't file the return for A.Y. 2011-12, because according to income tax act you can file any return befor expire the last of A.Y.that is last date is MARCH31st,2013
File an invalid return for AY2011-12 in such a way that your Assessing Officer belive that your income for AY2011-12 escaped assessment. If the AO belives so he may issue a notice u/s 148 and in response to which you can file a valid return for AY2011-12. Consequence of 148 notice is your return will be selected for scrutiny so you should be prepared for that.
I have not filed return for AY 11-12. Now 2 days back I have received a notice regarding compliance to that with some of the financial transactions printed back side.
Now can I file return vor AY 11-12 to comply with the notice.??