Whatever you do DO NOT click on any links in the email. The email might be a scam.
This just doesn't sound right that an email would come from TT saying there was an AT&T breach. You always would get a letter from AT&T, if that was the case.
If you clicked on any links in it, run your computer for viruses an change all passwords quickly.
Warn anyone on your email list that your data may be compromised.
I would also run a credit check as it is free one time a year. And set your credit that you need to be called prior to any cc being opened in your name.
IDnotify, a part of Experian, partners with TT to offer Full Identity Restoration, Identity Theft Monitoring, and Identity Theft Insurance services as part of PLUS Help & Support, MAX Defend & Restore, and Premium Services. IDnotify is the leading provider for identity protection, and fraud detection solutions and technologies.