one of our client filed a itr for the A.Y. 20011-12 on 30.7.2011, with refund (applied) Rs. 2900, but while filing the return he was not fill the depriciation schedule(block wise), but charged depriciation in profit & loss account, now befor 2 days he received intimation u/s 143(1) and found that IT department disallowed the depriciation of Rs. 8000 and refund payable (as per dept.) 2100. now my question is whether we file his rectification/revise return or no responce (he will satisfied if received 2100 instead of 2900).