If you completed and filed the 2018 tax return using the TurboTax online editions then the 2018 tax return should be available.
To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)
If the 2018 tax return is not listed, then TurboTax has not yet included the online 2018 return for access on the website after closing the 2018 online editions, but it should be available within a few days.
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
