the conversion order issued by deputy commissioner will have certain important conditions. The Occupant or the owner must comply with all the conditions laid down in the conversion order, lest, the order becomes invalid or in operational without any further notice to the applicant or the owner.
2) since land is converted into residential purposes pay tax on the land get e khata as advised by the authorities
3) as far as whether conversion of land for educational purposes is exempt from tax or not you can make necessary enquires with the local authorities