I have the same problem.
Here is enough data for you to verify the error.
First, the law is that if your AGI > $150K then your estimated tax payments for this year should be 110% of this year's taxes (as this poster stated).
But my taxable income exceeds $150K, while the total estimated tax payments (TurboTax lists) is only 90% of this year's taxes. And it's done it to me the previous two years. So like this poster I've faces a underpayment fee.
