I'm getting a window that says that I won't be able to e-file my return because my EITC is based on non-documented earned income. What does this mean and what do I do?

If TurboTax won't let you e-File, you'll have to file a paper return via US Mail.

Be prepared to wait a long time for processing.

I appreciate your comment and clarity. I ended up filing with TaxSlayer. I was able to e-file without any issues.