If I unintentionally bought TurboTax, is there a way I can undo it so that I can start my tax filing over?

I literally have no idea how it happened, but I just found out that I "bought" TurboTax after attempting to restart my tax filing. I need it to be restarted because my returns keep being rejected due to some "ClaimAsDependent" error was found and TT wouldn't take me to it.