These emails instruct taxpayers “to update your IRS e-file immediately.” The emails mention USA.gov and IRSgov, though notably, not IRS.gov. These emails are not coming from the IRS. Visit Tax Scam/Consumer Alerts for more information.
The IRS does not contact you by email. If you are contacted by phone, tell the person on the line that you have a paid preparer and you prefer that they contact the person on your form. Do not panic or give them any information!
One way to determine scams is to ask for a number to call back in 20-30 minutes. You have a right to do this, so don't let them scare you, whether the call is legitimate or a scam.