The IRS is only concerned with your federal return, not your state return. Did the IRS offset your 2018 federal refund for a state tax debt you owed? Sometimes the IRS does seize federal refunds for state taxes that are delinquent. Or do you mean you received a letter from your state saying you owe for tax due on a 2014 return? Do they say they changed something on your 2014 return, or that you did not pay what you owed when you filed the return --presumably in 2015 when it was due? Why do you think it was a TurboTax error? Did you check your own credit/bank records when you filed the 2014 state return to make sure they received your payment?