To return to the AGI question in TurboTax Online, please follow these steps:

• Login to your TurboTax Account 
• Click "Take Me To My Return"
• Click "File" from the left side of your screen
• Go to Step 3 (if needed, revisit Steps 1 and/or 2 to activate Step 3).
• Proceed, and make sure you've selected the option "I want to E-file"
• Continue through the screens and you will be given the opportunity to input your 2017 AGI
• Keep walking through the steps until you have re-transmitted your return