This answer posted above (and now below) worked for me! When I followed these steps form 2210 disappeared and problem solved:
1) Get rid of the 2210 using the interview (I guess the Online folks could try this too).
Problem is that the interview takes some unpredictable page displays, I can't predict what you see, but here is what I see.
2)....On the "Other Tax Situations" page, start thru the "Underpayment Penalties" interview.
......first Underpayment Penalty page ...YES
..........Filing status for 2017......you enter whatever it was.
..............2017 Tax Liability........you enter a ....zero..... !
..................2017 AGI.......leave it alone and continue
..........................No penalty, hit the Done button.
