Dear Madam
Presuming you bought the flat in FY 1994-95 , AY 1995-96
The indexed cost of flat is 200000 (pls add stamp duty, registration, brokerage IF ANY) X 785/ 259 = 606178 Lakhs
Exemption available u/s 54
Long Term Capital Gain from the Transfer of Residential House Property (Section 54)
The exemption under the Section 54 is available only an individual or a HUF who transfers (or sells) a residential house/property that results in a long-term capital gain, and then invests the amount of gain in acquiring a new residential house. This exemption is available subject to fulfillment of the following requirements:
(i) The transferor shall be an individual or the HUF,
(ii) The asset to be transferred must be of long-term capital asset, being buildings or lands appurtenant thereto, being a residential house,
(iii) The income from such residential house shall be assessable under the head "Income from House Property",
(iv) The transferor assessee should purchase a residential house in India within a period of one year before or two years from the date of transfer or construct a residential house within three years from the date of the transfer of the original house. (Construction must be completed within these 3 years.), and
(v) The new house property purchased or constructed has not been transferred within a period of three years from the date of purchase or construction.
Amount of Exemption. The amount of exemption under section 54 is
Equal to the amount of the capital gain if cost of new house property is more than the capital gain, or
Equal to the cost of the new house property if the cost is less than the capital gain.
Deposit Scheme under Section 54. Where the amount of capital gain is not so utilized for the purchase or construction of a new residential house before the due date of furnishing of the return of income, it shall be deposited by him on or before the due date in an account with a public sector bank in accordance with the Capital Gain Account Scheme, 1988. The amount already utilized on the new house together with the amount deposited shall be deemed to be the amount utilized for the purchase of new house under section 54. If the amount deposited is not utilised for the purpose of purchase or construction of new house within the stipulated period, then the amount not so utilised will be treated as long term capital gain of the previous year in which the period of three years expires. In such case the assessee is entitled to withdraw the amount from the bank.
Consequences of Selling the New House Before 3-years. If the new house property is transferred within a period of three years from the date of the purchase or construction, the amount of capital gains arising therefrom, together with the amount of gains exempted earlier, will be chargeable to tax in the year of sale of the house property. To attain this, the amount of exemption under section 54 shall be reduced from the cost of acquisition to the new house, while calculating short-term capital gains on the transfer of the new asset.