It appears that you are claiming both the Foreign Earned Income Exclusion and the Foreign Tax Credit. Is that because your foreign earned income is more than $126,500?
Here is part of the TurboTax help for the Foreign Tax Credit Computation Worksheet, describing what to enter on lines 12a1 and 12a2. When you make these entries the errors should go away.
"Lines 12a1 and 12a2 must be entered when applicable.
"If you excluded foreign income on Form 2555, enter on line 12a1 the amount of foreign earned income excluded (Form 2555, line 45) reduced by any itemized deductions that relate to the foreign income excluded.
"Enter your total foreign earned income for the year on line 12a2. This is the total foreign earned income from Form 2555 (both copies), line 26, reduced by deductible expenses allocable to that foreign earned income."
You didn't say whether you are using TurboTax Online or the desktop TurboTax software. If you are using the desktop software you can get additional help in forms mode. Right-click on any field and click "About xxxx" at the bottom of the menu that pops up.
