I just logged into my own IRS account the other day and was offered the option switch over to their new ID.ME log in method. What you describe is what I went through. The process switches from browser to text message to browser. Via text I took a picture of the front and back of my driver's license and submitted. The text then told me to go back to my browser and use my computer camera to scan my facial image (weird black and white creepy image of my face) which then verified it matched my driver's license. All of this will theoretically make logging on more secure. When I log in with this new process it uses MFA to text or call me to verify it really is me logging in.