@rmparkiii First, let me say that it's not so unusual for a TurboTax update to change an already-filed return. I've seen it myself many times. This is one reason that I wait until near the filing deadline before filing. In defense of TurboTax, however, there are often changes made by the government DURING filing season (crazy, right?) that the software engineers then must implement.
That said, @Critter-3 is correct in that you do owe any taxes that are legitimately yours to pay. The penalties and interest, however, if due to an error in the TurboTax software, are not your responsibility. See the info shared by @Critter-3 for filing an accuracy claim.
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
