Retirement tax questions

Thank you, this information is very helpful.   To clarify, yes - I did not take the 2019 distribution yet and still need to do that.

 

How do I calculate the missed 2019 distribution amount?   Every calculator I've found so far only calculates today-forward distributions so I'm not sure what the 2019 distribution was supposed to be - just that I missed it. 

 

I have correctly set up the 2021 distribution with my brokerage so should I just use that number?