If you e-filed your 2019 tax return the 2018 AGI you entered is your electronic signature and identity verification.  There is no physical signature on an e-filed tax return.

If you need a copy of your tax return with a signature, download the PDF of the 2019 tax return.  Sign the Form 1040 in ink on page 2 in the block labeled Sign Here.

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)

Or -

When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state. 

This will take you back to the 2019 online tax return.

Click on Tax Tools on the left side of the online program screen.  Then click on Print Center.  Then click on Print, save or preview this year's return.  Choose the option Include government and TurboTax worksheets

I went back and looked at my 2018 taxes and even tho I signed electronic it still had a name printed there.

@randyjdye Yes--your name is printed there.  Your computer printed name is not a "signature."   If someone needs a signed copy of your return--like a lender, etc. -- take out a pen and sign the return on the line that says "Sign here."