did you enter all your tax info? many have posted that they just received new tax forms that weren't on the original submitted return now many will have to amend
if your return is complete, did you click on that orange transmit button?. if not, your return has been submitted. if you have you should receive 2 emails (look in spam folder too) one saying submitted successfully and if you get that then the next one will say accepted or rejected. rejected returns need to be corrected and resubmitted.
if you e-file state returns you'll get similar e-mails.
efiling doesn't officially open until 1/28 so don't expect the emails before then. and then it could be 2 more days for the emails to be sent out.