Can be set off or no?

Query  : 

1) If der was loss under the head house property (no capial gain) & return was filed late than can i set off earlier loss in ths currnt year ?

If yes pls answer wid section..

i have referred section 71B but i hav not found out the consequences of late return filed .. 

kindly guide me :-)

Thanxs in advance :-)

Regards vishal Khari