✅ Official notice on file. Oklahoma Tax Commission filed this data breach notice with the California Attorney General on Mar 27, 2026. Compare it with the letter you received: the official copy is linked below.
Oklahoma Tax Commission reported a data breach caused by unauthorized access to its computer network. The information involved includes Social Security number.
Key facts
| Incident type | Network intrusion |
|---|---|
| Data exposed | Social Security number |
| Letter sent | Mar 27, 2026 |
| Reported to California AG | Mar 27, 2026 |
| Company helpline | 1-833-799-5355 |
Free credit monitoring
Oklahoma Tax Commission is offering 12 months of Cyberscout (TransUnion) at no cost to people who received the letter. Enroll at bfs.cyberscout.com/activate using the activation code printed on your letter.
What to do now
- Freeze your credit for free at Equifax, Experian and TransUnion, and request an IRS Identity Protection PIN at irs.gov to block fraudulent tax returns in your name.
- Get your free credit reports at AnnualCreditReport.com and look for accounts you do not recognize.
- Call the Oklahoma Tax Commission helpline at 1-833-799-5355 if you have questions about your letter.
Timeline
- Mar 27, 2026 — Notification letters sent
- Mar 27, 2026 — Breach reported to the California Attorney General
Other recent data breaches
- Deposition Solutions, LLC data breach
- Mercadien, P.C. CPAs data breach
- Toyo Tire Holdings of Americas Inc. data breach
- STS Aviation Group data breach
- Alma Family Services data breach
Source: notification letter and filing submitted by Oklahoma Tax Commission to the California Attorney General. BreachLetter is not affiliated with Oklahoma Tax Commission. Details extracted from the official letter; always follow the instructions in your own copy.