It has happened to me several times, in spite of the reviews saying everything is fine. The problem could be a calculation on Form 1116 Part III line 18. This line should be populated by TurboTax with the same amount shown on Form 1040 line 15.
In my case this does not happen. The two amounts are not the same. I called Turbo Tax twice. In both cases the line fell as I was just finishing explaining the issue.
