Interest earned in your case will be taxable as other sources income. You cannot claim Capital Loss against interest Income and since you will be filing a belated return, you will not be able to even carry forward the Capital Loss. However you can claim any interest expense that you incurred (actually not notional interest) against this interest Income. TDS shall not be deducted if he has returned just your deposits. if you did not gave any deposit and yet received money you can show Capital Gain/Loss against your property transfer. Howver as I said you will not be able to carry forward such Loss.