Wrong entry in book of account

if any person make wrong entry in the bbok of account in the year 1.4.2010 to 31.3.2011 what he has to do??

like if any person give check to party for advance payment  true entry is:-

party a/c dr...125000

To cc limit...............................125000

but account post wrong entry that is :-

cash a/c Dr.......125000

to cc limit...................................125000

the assessee has submit his return for A/Y 2011-12 after due date since reture is file after due date there is no scope of revised the return so return cannot be revised hence no scope of rectifed the mistake in the return for A/Y2011-12

SO MY QUESTION IS WHAT TO DO NOW???????????????????????????????