What do you need to change? You don’t need to update your Turbo Tax account. Just do 2025 and manually change any prior info as you go along. If your 2024 return was amended you might want to not transfer from the original 2024 return.
There is a tricky way to clear out transferred info in the Online version. But doing this will also clear out all your entries. Go to Tax Tools > Tools > Transfer from your computer > Continue > then Continue without transferring.
