Laps to file itr

IT return can be filed now only from AY 2015-16 onwards. Prior to that it is not possible now as they are time barred.

unfortunately , this person can only pay itr for previous 2 financial year in India,
for instance, if he want to file his taxes for the period of april2016 till 31march 2016 then he can only file ITR for the FY 2014-15 &2015-16.
the due tax can be paid through challan280 for the relevant year.
he can file the taxes online from the website of the Indian tax department or through private tax filling companies such as H&R Block.
for remaining years, he can contact his local income tax office ,and the AO will provide him with other option to pay the pending taxes.
But delayed filling has its own drawback:
1) penal interest may be applicable u/s 234 A, 234 B, 234 C
2) Delayed returns cannot be revised
3) he will not allowed to carryforward some losses that belong to the years for which returns were not filed.