See the instructions included in the TurboTax FAQ below. You'll see "How to get an older tax return" in blue letters, which can be expanded for full instructions.
https://ttlc.intuit.com/replies/3301525
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
