What should be included in salary for tax computation?

vinayak c. chavan (CPT passed) (1011 Points)

20 December 2012  

I am an employee of private limited co. In salary from company I am receiving i) Basic salary ii) Diwali bonus (once in a year) iii) Conveyance allowance iv) Commission on sales (as variable pay). My company is deducting some expenses from my salary i.e i) Mobile charges ii) profession tax. For Tax computation how should I arrive at net salary i.e. what should be added/deducted?