Easy---wait until after January 24 when the IRS begins to accept/reject e-files. Right now your e-file is just sitting on a server, and it will be there until the IRS opens on January 24. Watch your emails.
When you e-file your federal return you will receive two emails from TurboTax. The first one will say that your return was submitted. The second email will tell you if your federal return was accepted or rejected. If you e-filed a state return, there will be a third email to tell you if the state accepted or rejected your state return.