If you are sure you have everything necessary entered (and lots of documents still arrive in mailboxes later in January and February ) you can e-file now. But your return will just sit on the server.
The IRS will not begin to accept/reject returns until January 28. Until then, e-filed returns will just be sitting on a server, waiting. You will receive an email after that date letting you know if your return was accepted or rejected. It will probably take several days after January 28 for them to work through the backlog of returns on the server.
https://ttlc.intuit.com/questions/4169486-can-i-change-my-return-if-i-already-submitted-it-and-you-r...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
