Confirmed

Oklahoma Tax Commission: unauthorised access to W-2 and 1099 files in OkTAP

In December 2025, the OTC learned of suspicious activity in the OkTAP taxpayer portal; certain W-2 and 1099 files were accessed without authorisation between July 5, 2024 and December 20, 2025, containing names and SSNs.

Last updated: 2026-11-09

Overview

The state’s cyber incident listing says the incident was identified on December 19, 2025. No total is given. The first-disclosure date is the earliest public document confirmed (California AG posting); no 2025 public disclosure was found in other state AG lists, HHS or company notices checked.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Verify notices through official channels, avoid links in unexpected messages, do not provide credentials, and review credit reports and statements.

Sources

  1. Sample consumer notice filed with California AG (Oklahoma Tax Commission)California Department of Justice, Office of the Attorney General · 2026-11-09
  2. California AG data breach report: Oklahoma Tax CommissionCalifornia Department of Justice, Office of the Attorney General · 2026-11-09
  3. Oklahoma OMES: Dec. 19, 2025 incident – Oklahoma Tax CommissionOklahoma Office of Management and Enterprise Services · 2026-11-09
  4. Vermont AG: State of Oklahoma notice to consumersVermont Office of the Attorney General · 2026-11-09

Related information

Share a report

No published information yet

Information appears here after source checks or moderation.

Comments and replies

Write a comment

No account needed. Comments appear immediately.

Do not post private names, addresses, passwords, or codes. Automatic masking is limited; review your content before submitting.

Required fields are marked *.

After submitting the text, you can redact and attach images.

Loading the security check. You can submit once it is complete.