if agreement value is less than market value you have to pay stamp duty as per ready reckoner rates
2) if a buyer purchases a property for a price below the applicable stamp duty value and the difference between the price of the property that has been paid and the stamp duty value is more than Rs 50,000, then such a difference is assumed to be the income of the buyer.
It is taxable in the hands of the buyer, as 'Income from other sources'
3) section 56(2)(vii)(b)(ii) works on the assumption that the buyer of the property would have paid consideration more than the stated consideration.
3)builder cannot sell car parking slots as it forms part of the common areas of the society . builder can allot car parking slots
4) dont give any cash to builder