TurboTax does not ever get any information from the IRS or state after you file your tax return so no one at TT knows why the state changed something on your return. The state will send a more detailed letter later on. Or you can call them and ask.
How did you pay the state tax due? Maybe it didn't go through.
Check the printout or PDF of your return; look for the state cover sheet with the Turbotax logo. If you owed tax, it will show the payment information and how/when you decided to pay. Read the state payment instructions carefully since most states cannot be paid from within the TT system and requires additional steps.
Your only proof of payment is your bank statement or credit card showing the payment coming out. Turbo Tax only passes your bank account number to the state for the state to take it out of your account. But most states do not let you pay by Direct Debit so you have to mail in a check or go directly to the state's website to pay.