After you file

In other words, it appears TurboTax made a mistake in their calculation, showing I was owed a State refund, which I filed , assuming that the calculations were correct. Then later, after changing nothing in the TurboTax forms or adding no new documentation, TurboTax changed its calculations to show I owe. The difference is about $1,000. Which one is correct, the first one or the changed one?