I am having a in Hyderabad India,got registered in 2001 and purchased through bank loan and balance paid through other savings, the amount invested on flat was rs.30lacs and selling price may be 79 lac.I have booked now another flat (keeping in view, I can invest this amount in this new flat) advance paid fom my salary savings rs.20 lacs (new flat cost including registration comes to 90 lacs).I have to pay any capital gains/tax?