I have made donation in PM Cares Fund in May 20, can I avail deduction in FY 19-20 Income Tax Return?

Donation (including donation made to PM Cares Fund) made by individual between April 01, 2020 To June 30, 2020 shall be eligible for 80G deduction in either FY 2019-20 OR FY 2020-21.Hence, individual may assess, what option is better to get maximum tax savings.