If you delete it on the 2019 return then the assets will also be lost ... hopefully you kept a copy of the 2018 return with the worksheets for your records ... if not download one now.
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)
