Claiming deduction u/c VIA

Kartick Mondal (1) (91 Points)

26 August 2020  
Whether it is mandatory to claim deduction under chapter VIA in F. Y. 19-20, if a person invest/deposit 1. 4. 2020 to 31. 7. 2020 ? Or he can claim it in F. Y. 20-21 as he desire.