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)
If you download the PDF of the tax return, the file can be viewed by any PDF compatible PDF viewer, such as Adobe Reader - https://get.adobe.com/reader/
If you downloaded the tax data file, it will have a file extension of .tax2018 for tax year 2018, then that file can only be opened by the TurboTax software for the same year as the data file.
If you have download the PDF of the return and the file extension is not .pdf but .txt, then rename the file extension to .pdf.
