This does not work. I never get to Underpayment Penalty. I poked around at the forms view and think I understand what is happening is I am not being asked about an underpayment penalty because the underpayment amount is below some threshold and there is no underpayment fee.
So, I am good for now. What I did figure out is there does not seem to be any way to tell TurboTax that my state withholding was not done uniformly. Data sources tells me that Form M-2210 estimated tax paid numbers include, for each period, 25% of the Tax Payments Worksheet Line 14-Total withheld. That's not the right thing to do if income and withholding is front-loaded in the year. I can adjust the information about the timing of withholding for Federal taxes but not for the state taxes. If I override the numbers in the form version it will not calculate automatically.
