New tax regim/slab 2020

Thank you. One more query. I booked an under construction property in 2017 on loan and I will get possession in 2021 which I will move into. If I sell my other property where I am currently staying in 2021, would I be eligible for 54f exemption?

Would allotment date or registration date be considered for computation on capital gain exemption under sec 54?

Thank you Amit. There is really confusion on whether allotment/booking date or registration date is being considered for computation on capital gain exemption under sec 54?