In respect of immovable property, income tax is chargeable for any gain in transfer of property in form of sall/ purchase. It is very difficult to answer the qurrery of Mr.susil becasue details relevant informations are not available there. For sulution please inoform the followng details
What is the date of purchase of such land?
What is the date of Sale of such land?
Regarding 20laks of tax, Whcih kind of tax you have paid and on which date you have paid?:
Also other relevant information please give to answer property.