Some plans allow participants to postpone RMDs until April 1 of the year after they retire, even if they retire after age 70½
Employees of public schools and certain tax-exempt organizations with 403(b) plan accruals before 1987 should check with their employer, plan administrator or provider to see how to treat these accruals.<a rel="nofollow" target="_blank" href="https://www.irs.gov/newsroom/most-retirees-need-to-take-required-retirement-plan-distributions-by-dec-31">https://www.irs.gov/newsroom/most-retirees-need-to-take-required-retirement-plan-distributions-by-dec-31</a>
Please check with plan administrator.
However, if this plan is from a prior employer, you do need to take the RMD.