Capital Gain Exemption u/s 54F

Prasad Hegde (40 Points)

21 November 2020  
Dear Professionals,
I had sold my vacant site on 5th July 2019 and had a plan to buy one house and claim capital gain exemption u/s 54F. but I am not able to buy the house till 30th September 2020 and I bought a house on 3rd of October 2020. Can I claim this under section 54F exemption whether this is valid?
(I have not invested the amount in capital gain exemption scheme since my due date for filing income tax return is 31st December 2020)
Please clarify me.