Can you help me find a message on the site? A Turbo Tax rep emailed regarding my return. The email said to sign in to get message. I don't see it. How do I find it?

The IRS says I owe back ALL the ACA subsidy received in 2019. This is $6,000.00. A Turbo Tax expert sent an email with information that might help. The email said to sign into site to read message. When I do that, I can't find the message. Where would it be?