Tax on property sale

Your asset is a long term capital asset and hence benefit of indexation would be available. However as per Finance Act 2017 the base year has been changed from 1981 to 2001 and the new CII figures have not been released yet. Hence it is not possible to calculate Capital Gain or Loss as of now. However if you incur capital gain you can invest the gain amount into new property by purchasing it within 2 years from the date of sale of old property or buy eligible bonds within 6 months from the date of sale.