Since you are trying to avoid a penalty for what looks to be a withholding underpayment, go to FORMS and see Form 2210. Sounds to me that you need to check YES in question 9 of PART I. By doing this, you leave the evaluation of penalty up to the IRS and when they see the numbers, they will understand.
All the amounts get filled in by TT.
I had to do this for another reason.
