Commission received by way of discount at the time of purchase of property

Can i know the basis. In fact it is reduction in my cost right.

it is simple if you dont show the amount of rs 50000 in your income then you wont be able to claim the same from the gross tax payable as the net tax payable is arrived after reducing tds and advanced tax. better you show it or you wont be able to reduce the same from your tax liability