Log in ... scroll down ... choose 2018 ... look at AGI ...
Make sure that you are signing in to the same account you used to file your tax returns. Some TurboTax users have multiple accounts. How do I access a prior year return?
Here's how to find out which TurboTax accounts are linked to your email address:
If you have multiple TurboTax accounts, pick one and stick with it when you do future tax returns. That way we can automatically transfer your tax info over year after year. It also makes accessing your prior-year returns much easier.
If all else fails, try ordering a transcript of your 2018 return from the IRS at this site: IRS Get Transcript