Let's start at the beginning. Was the 2017 return prepared in Online TurboTax? If so, log in and at the Tax Home go to the section "Your Tax Returns & Documents." Expand that section and choose tax year 2017. Do you find the return? If so, what happens when you click on "Download/print the PDF?" Does it ask you to pay to access?
If you only need the 2017 AGI, there should also be a free link there to "View the adjusted gross income (AGI.")
Or do you not find any evidence of the online 2017 return in your account at all? If not, then we can tell you how to look for multiple accounts.
If access to the 2017 return is locked, and it asks you to pay, then how to unlock the 2017 return depends on what all you have done for your 2018 return. Have you already filed a 2018 return with Online TurboTax, or is one still in preparation?
Is your 2018 return in the SAME account as the 2017 return?
You appear to be using "Live Basic", at least that is what is indicated next to your username above. That is an upgrade to Free Edition that includes live tax help from a CPA/EA and a final review of your return, which they will sign. Live Basic is 79.99 for a Federal return and 34.99 for a state return. Is that the product you used for your 2018 return?
