If you are paying tax before filing the return, then it is called Self Assessment Tax (not Tax on regular assessment). Take care to fill the Challan 280.
1. Write Assessment Year as 2010-11
2. Tick on (0021) Income Tax other than companies
3. Tick on (300) Self Assessment Tax
4. Fill the amount of tax in Income Tax (no need to split education cess, interest etc.,)
5. If the Rubber stamp is not clear, then ask the bank their BSR code & Challan Number.