Excellent work by the commenters on this question, particularly the work-arounds. I see what TT did wrong, and it especially hits people like me who pay much of their taxes by estimated tax payments. The official IRS instructions for Form 2210, Line 6 says to add the amount on Line 16 of Form 1040 (which is taxes withheld on a W-2 or 1099) plus the amount on Schedule 5 to the 1040 (which includes estimated tax payments). TT forgot to include the Schedule 5 amount in their program's calculation of Line 6 of the Form 2210. Consequently, if you are a big estimated tax payer, you get no credit for those payments in the TT program and get hit with the Form 2210. So it is an easy fix to change the calculation of Line 6 of the Form 2210 to include the Schedule 5 amount (to the extent that anything in software is easy). I expect that is what we will see in the promised March 1 update.
