Sorry, Only the year you actually take it. If you take it in 2020 it goes on your 2020 return that you file in 2021.
Are you asking about taking an RMD? When you turn 70 1/2 you have to start taking the RMD required minimum distribution, but the first year you can delay taking it until April 1 of the next year. But then you would have to take 2 RMD.
