TurboTax never knows if you paid your state tax due. TT receives no information from the IRS or your state after you file your tax return. Your only proof that you paid your federal or state tax due is your own bank or credit card record. TurboTax would not contact you to say that you "underpaid" since TT has no idea how, when or even if you paid the state.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
