Tax-mt Data Breach Lawsuit Investigation

Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Tax-MT, PLLC data breach.

If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.

About Tax-MT

Tax-MT PLLC, also known as Tax Montana or Tax-MT, is a tax advisory and preparation firm based in Billings, Montana. The company provides personalized tax services for individuals and small businesses, focusing on federal and multi-state tax return preparation, tax strategy, IRS representation, bookkeeping, payroll, and financial planning.

What Happened?

Tax-MT experienced a ransomware attack by the group known as PLAY.

On July 21, 2026, the group claimed to have obtained private and confidential client data, including documents related to budgets, payroll, IDs, taxes and financial information. They threatened to publish the data within five days.

The company notified affected individuals by written notice on Oct. 20, 2026. The breach was disclosed to the Massachusetts Attorney General's office on Oct. 27, 2026.

So far, Social Security numbers are the only information type confirmed to have been potentiall

You May Be Entitled to Compensation

If your information was compromised in the Tax-MT PLLC data breach, you may be entitled to compensation. Lawyers are ready to help affected individuals understand their rights and pursue claims for damages related to this incident.

To find out if you qualify, complete the below form to join a lawsuit and take the next step in protecting your rights.

Sources

• Massachusetts Attorney General
• Dark web