Belated ret

HARSHIT (PARTNER) (88 Points)

19 September 2012  
my client filed ret of ay 11-12 manualy after due date on 31 march 2012 in itd nd in that he forget to show income u/h cg nd exemptin u/s 54 nw he got air notice of 143(2) notice nd can he nw rectify return or he can file online return for that or wat else can he do please tel me waiting