1) I sold a piece of urban vacant land in april 2011 for Rs 21,60000/- whose indexed cost of acquisition in 2011-12 is Rs.6,08,000/-. 2)I booked a res. flat under construction for Rs 19,20000/- and agreement for sale was executed on 9/9/2011 3)I paid Rs. 15,70,000/- to the builder till the due date of furnishing returns ie 31/07/2012 4)but unfortunately could not open a capital gains account and deposit the remaining consideration amount of Rs 5,90,000/-. My questions are; 1)Can I claim exemption for the amount already paid to the builder till 31/07/2012 and pay the capital gains on the balance money. 2) how to calculate the capital gains in the above case. 3)what proof of payments to the builder before 31/07/2012 is required to be furnished for claiming exemption.Agreement for Sale or money receipt of the builder or both?