One of the the best and easiest tax calculation excel (xls) sheet/calculator is available at http://taxcalc.ynithya.com for download for the year 2012 – 2013.
This FREE excel based Indian Income Tax Calculator for 2012 – 13 can be used to compute tax liabilities for salaried individuals only. It can be used be used to calculate approximate tax payable by salaried individuals, in India. Provision to distinguish male/female also available which becomes handy in tax calculation.
Download latest version for Financial Year 2012 – 2013 available at