@Anonymous_ Thanks for your help. I think I figured it out/confirmed what needs to be paid. I put the $88k in the Tax Payments worksheet then re-did the step-by-step process but at the end removed the "Date You'll Pay the Balance Due" (previously 1/15/24). After doing that and checking the forms, Row 11 (d) changed to the $88k and the same minimal underpayment penalty was due as before (i.e., only on the Row 10 & 11 (c) underpayment). The wording of that screen is tricky at best -- it says that entering the date or not will determine the underpayment penalty amount. But obviously there is more to it than just that, and the value it enters if you put in the date is the full tax amount due.
(and for the love of Mike, I wish Turbo Tax wouldn't auto-check the box that says "do not use the annualized income installment method" immediately after guiding you through the process to enter all the AI data. In multiple iterations of trying to figure this out, when clicking through the interview and leaving all the values the same I've accidently left that checked more than once, requiring me to have to go back through and re-add all the AI data again.. argh. and really, why would you even ask that at that point?)
Thanks again - much appreciated.
