Just to update everyone: it turns out the IRS de-activated my EFIN because they suspected it was compromised. No warning or anything, just shut it down and all of my e-file returns immediately started getting rejected. Called first thing this morning and the IRS was very quick to issue me a new EFIN which I then updated into my ProSeries and Intuit account. Within two hours I received an email from Intuit stating my new EFIN was accepted. Unfortunately my returns are still being rejected. I spent an hour on the phone with Intuit checking my account and doing updates and apparently it could take up to two days for my updated license to be accepted by the system. Not good news on 4/13. So I just keep working on returns I can't file yet and every hour or so try to file one hoping it doesn't get rejected. Good times.