Regarding house property

Yes he can file return..

He can file his return of Income up to 31.3.2014..

However, He can't claim any loss arising there in..

AO may impose penalty of Rs. 5000...

You can file return up to 31.3.2014.   for A.Y. 2012-13 but not shown in loss & have any tax liability , paid with interest.

Thanks

Yes, you can file return of income for A.Y 2012-13 upto 31-3-2014.  As well if he has any self assessment tax payment liability then he required to pay interest u/s 234A,B and C if applicable.

                 But AO has a right to levy penalty of Rs.5,000/- for delay of return of income by more than one year from the end of the financial year.   But at the time of filing of return of income you need not to pay any penalty if it is insisted by AO then you required to pay, because of it depending on the willing of the AO and you couldn't show penalty paid amount and details in return of income.

OM SAI SRI SAI JAI JAI SAI