Thank you. Yes, I do understand.
As it turns out, in my situation of changing filing status from MFJ for 2019 to MFS for 2020, I was underwithheld for the year (more than $1,000).
Though there is a small penalty, (as it turns out) no boxes need to be checked in Part II, and it is not necessary for me to file Form 2210. At the time I initially inquired about the "not done" status of Form 2210, I was not aware that I did not need to check box “E” in Part II of Form 2210, nor do I need to file Form 2210, though the Form still calculates the penalty and includes that on Form 1040.
With no boxes checked in Part II, the “Not Done” disappears from the Form 2210 status under “Forms in My Return,” allowing my tax return to be filed without error messages.
