Here's the help response from Turbo Tax online...
"Not checking this box does not affect your ability to file but may impact certain residency-related qualifications or deductions."
It doesn't mention EIC and I see others have spent time chasing this down. It seems it really should be checked, unless there's a reason from the "interview" to uncheck it.
I went to the trouble to reenter my address information, even though we've lived in the same house for 30+ years, and have used TT for a significant number of those years.
