Try using the IRS webpage linked below to access a transcript (abbreviated version) of your 2017 return. On this transcript, you'll find your 2017 AGI and should be able to complete your e-filing.
https://www.irs.gov/individuals/get-transcript
*** 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.***
