You wait to see if the return is accepted or rejected. It is past the filing deadline, so if you owe tax due, you are subject to late filing penalties and interest on the tax owed. If you do not owe or are getting a refund there is no penalty for filing after the deadline. Watch your emails for the acceptance or rejection messages.
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.