The Secure Act made major changes to the RMD rules. If you reached the age of 70½ in 2019 the prior rule applies, and you must take your first RMD by April 1, 2020. If you reach age 70 ½ in 2020 or later you must take your first RMD by April 1 of the year after you reach 72.
So if born in Sept 1949, you would turn 71 in 2020 and not 71 1/2 (and 72) until 2021. Therefore the year after turning 72 will be Apr 1, 2022 for the first RMD.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**