Nowadays , Salaried person are planning to calculate income tax on their income to be deducted from their salaries. To make it easy a following excel based free Income Tax Calculator for financial year 2008-09 or Assessment Year 2009-10 can be easly downloaded through below link
(Don't Forget to give your comments for it's further Improvement)
Suggestions are always welcomed through email at firstname.lastname@example.org
Income Tax Circular No. 9/2008 dated 29.9.2008 regarding Section 192 of the Income-tax Act, 1961 - Deduction of tax at source - Income-tax deduction from salaries during the financial year 2008-09 is also attached.