Hmm. I entered a value of $88k for the 1/15/24 estimated tax payment and re-did the 2210 and 2210AI forms, but the values on Form 2210 Rows 10 and 11 did not change.
I'm still not certain which one I should be planning to pay - the "Required Installment" of Row 10 or the "Estimated Tax Paid" of Row 11.
Although now I'm re-reading that "if line 11 is equal to or more than line 10 for all payment periods, stop here; you don't owe a penalty". So that increases my belief that I would only need to pay the $88k on 1/15/24 since that would exceed the amount on Row 10 (d), and I would only owe a small penalty for the underpayment of column (c) since no estimated tax was paid on 9/15/23.
But is there a way I can change the value of Row 11 (d) in Turbo Tax to test this out and see if the penalty amount changes? Over-writing doesn't change any other values and changing the value in the Tax Payments Worksheet doesn't seem to effect Row 11 (d) either. So I'm not sure where it's pulling the value from.
