If you are definitely planning to retire this year, make sure you check off as many things on this list as you can: https://www.nasdaq.com/articles/what-you-need-to-know-if-you-will-be-retiring-in-2021-2020-11-13
It might be advantageous to put off any 2021 retirement plans for a while: https://www.fool.com/retirement/2020/12/25/3-reasons-why-2021-may-be-a-bad-year-to-retire/