EDITED 1/9/2017: Many of the state forms (and likely one you need in your IL return) are not yet available to TurboTax. It's early in the year, and the IRS doesn't even begin accepting returns until January 23, 2017. Once your federal return has been accepted AND all of your state forms are available, you'll need to return to your state return to complete your e-filing of the state return. See the proposed availability dates for both federal and state forms below.
https://ttlc.intuit.com/replies/3319876
https://ttlc.intuit.com/replies/3319879
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
