I need a copy of 2018 tax return so I can show proof of identity so I can complete and send 2019 return on turbo tax

[Critter-3]

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)

[AnnetteB6]

See the following TurboTax article for your options to get your 2018 AGI in order to file your 2019 return:

How do I find last year's AGI?

@2475raiders