New Req'd Minimum Distr RMD from IRA age is 72 years old, not 70 and a half.

[still_one]

6. .............

Required minimum distributions (RMDs) now begin at age 72
Americans are working longer and will no longer be required to withdraw assets from IRAs and 401(k)s at age 70½.
RMDs now begin at age 72 for individuals who turn 70½ in the calendar year 2020.
If you turned age 70½ in 2019 and have already begun taking your RMDs, you should generally continue to take your RMDs. The IRS may provide further guidance on this point, so you might want to speak with your tax advisor regarding any 2020 distributions.

To calculate the RMD you need to know the value of the retirement account on Dec 31st of the previous year to calculated the RMD


https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-required-minimum-distributions-rmds

Thanks for the correction