Expenses deduction from Income

Ashish (Professional) (117 Points)

23 February 2011  

For a businessman or professional if he/she deducting some expenses from the total income then he/she must required the bills of the expenses incurred.

I heared from people that you can claim 30-40% expenses from total income without any need to show any bills. For claiming the expenses more than this, you need the bills.

Please throw some light, what is the right method...?