Unless TurboTax specifically instructed you to print and mail some or all of your return, you're finished. But just to be sure, take a look at the instructions below on filing your return using TurboTax online.
https://ttlc.intuit.com/replies/3301375
Be sure to watch your email for notification that your return has been successfully transmitted. Then, in a day or two, you should receive notice that your return has been accepted or rejected by the IRS.
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***