For F.Y 2019-20 Compliance of any provisions of Chapter VI-A under the heading “B.- Deductions in respect of certain payments” i.e for investment to claim Deduction u/s 80C to 80U is extended to 21st July, 2020..
So, investment made under section 80C to 80U from 01/04/20 to 31/07/2020 you can take benifit of same in F.Y 2019-20 or F.Y 2020-21 (in any one year) as per your choice.