@mn2019 - TT will stand behind their calculations - that is what the guarentee is....but the extent of their coverage is the penalties and interest you are changed due to their error. any increase in the tax owed is not covered by the guarentee; that was clear in the disclosures before you began preparing the tax return.
if you went to a local tax accountant would you expect them to pay the tax if they made a mistake? or offer to pay the penalties and interest due to their error?
