What problem are you having?  Do you see it in your account?  What version are you using for 2018?

To access your current or prior year 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)

Why you have to pay to access prior years

https://ttlc.intuit.com/community/charges-and-fees/help/why-do-i-have-to-pay-to-access-my-prior-year...