Hi Renee,Thanks for responding. Unfortunately, that article provides a good overview but no real specifics.

Hello,I deleted Form 2210 and TT is still calculating an underpayment penalty of $21. FWIW, I actually paid more taxes this year than last. So, any advice as to...

I agree there's a bug! I'm writing this as of 3/2/21. I owe an underpayment penalty even though I paid >90% of last year's tax liability. TT is for some reason ...