Why isn't my 2018 return coming up when I enter my email account?

[KatrinaLO]

If you haven't paid or filed yet, you can view, edit, print, or e-file your 2018 TurboTax Online return through October 15, 2019 (after which we close e-filing for the 2018 tax season).

Is it possible you have two accounts set up? If you are trying to access your tax return and unable to log into your previous account, the below information will assist you in regaining access. 

https://ttlc.intuit.com/replies/3290682

Using any paid TurboTax Online product or adding PLUS in Free Edition gives you access to all your TurboTax Online returns through October of the following year. Doing this every year lets you enjoy uninterrupted access to your last seven years of tax returns.