I need the back-up file for my 2017 online tax filing. How do I obtain them? I need to file an amendment to my taxes and my accountant needs the info.

[DoninGA]

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)