Help needed for LTCG applicable

I booked a flat in 2009, However no construction happened till 2025. Post which I was forced to liquidate the asset.

How much income tax payable for flat (booked in 2009). If there some tax rebate available as builder failed to construct:

1st installment paid by me on 07 Aug 2009 = 199690
2nd installment paid by me on 25 Feb 2016 = 200000
Additional misc expenses for the property in 2017 = 25000

Sale amount received on 07 Feb 2025 = 1400000