You always owe your own correct tax. If the program made a mistake, the Turbotax guarantee is supposed to cover any interest or penalties. You have to apply for the guarantee within 30 days of getting a penalty notice.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/submit-claim-turb...
However, if the problem is that you missed or incorrectly answered the "foreign person" question, Turbotax considers that user error and won't pay the claim.
