Retirement tax questions

The answer really doesn't make sense to me. This is an annuity so that would mean I would have to amend my 2019 return, not claim any income in 2020,  and then when I get my 1099R for in 2021 it would have and the same P code is in box 7  again and I would have to amend my 2020 return.  That is  a circular file and amend process that just can't be the way that this is intended to work.