Can't answer your question about TurboTax requiring an unnecessary form, but have encountered the opposite problem where TurboTax fails to file a necessary form. Even though TurboTax automatically completes an AMT version of Form 1116 it doesn't file it if you don't owe AMT. But when you carry forward or back a foreign tax credit IRS requires the 1116 AMT calculation. I have worked around this by e-filing, then submitting an amended return just to include the 1116 AMT, but it would be easier if there was a way to include it when e-filing.
