Trying to find a completed but not filed 2018 tax form

You can find a copy of your completed but not filed 2018 tax return from TurboTax by following these steps: 

Sign in to TurboTax making sure you're using the same TurboTax account (with the same username) you used in 2018.  

1. Select Documents from the navigation when it appears.  

2. Use the drop-down menu at the top of the screen to choose the tax year you want and then select Download PDF.    

This link  How do I access a prior year return? has additional information that you may find useful