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)
The PDF download for tax year 2018 will only include the forms and schedules needed to file your tax return. The worksheets and other pages are not included in the PDF until the 2019 online editions become available in December 2019.