19 March 2012
Intimation u/s 143(1) can be issued for the following cases.
After filing of the return ,
Intimation of completion of assessment of income tax returns ,
Intimation of Income tax refund in case refund is due to assesse by department.
If net tax payable is more than total tax paid ( due to mistake or otherwise ), then Intimation u/s 143(1) will be treated as demand notice for payment of income tax due to income tax department.
In case of Demand notice, required amount you have to pay with in 30 days or you can appear before personally with AO.
or
You can make rectification u/s 154 in case of mistake.