If you e-filed your 2019 tax return it has already been electronically signed when you entered the 2018 AGI or if a 2018 tax return was never filed you entered a 0 for the 2018 AGI.
You should always keep a copy of your tax return -
To access your current or prior year online tax returns sign onto the TurboTax website with the User ID 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)
