go back to your deductions page and look at the medical deductions, i had to go through the entire section even though i didn't have any medical deductions. once i went through the section, it let me file

@mike-allenovitch, please use the FAQ link posted below to sign up to get updates when this issue has been resolved, as it's an ongoing issue that TurboTax is aware of and is currently working on a resolution:

Deductible Home Mortgage Interest Worksheet XXX Error