TurboTax, via Form 2210, is saying that I owe an underpayment penalty even though I paid (via a combination of withholding and estimated taxes) more than 90% of the current-year tax liability.
This is inconsistent with IRS requirements, which clearly state that an underpayment penalty is not assessed if 90% or more of the current-year tax liability has been paid.
Please advise how to proceed.
