If you e-filed your tax return then it was electronically signed using the 2016 AGI or your self-selected 5 digit PIN. There is no physical signature on the tax return.
To access your current or prior year 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)
