Guthmann Tax Services, Inc Data Breach Lawsuit Investigation
Clients of Guthmann Tax Services, Inc were notified that an unauthorized actor accessed the firm’s network and removed sensitive tax-related information between June 16 and June 18, 2025. If you received a breach letter, you could be entitled to free legal assistance and potential compensation.
Take action: Request a free, confidential case evaluation to protect your rights and explore possible claims.
Download Official Breach Notice (PDF)What Happened?
According to the notice filed with the Maine Attorney General on October 7, 2025, Guthmann Tax Services, Inc discovered on June 25, 2025 that fraudulent tax returns had been filed using information tied to several clients. A forensic investigation revealed that an unauthorized party accessed one of the firm’s systems for a brief period—June 16 – 18, 2025—and transferred data out of the environment.
The firm reported the incident to the Internal Revenue Service (IRS), relevant state tax authorities, the FBI, and the U.S. Secret Service. Guthmann Tax Services states it has no evidence that the stolen data has been misused beyond the fraudulent filings already identified.
Information Exposed
The exact data accessed has not been conclusively determined; however, Guthmann Tax Services advises that the information could include:
- Name and gender
- Date of birth
- Address and telephone number(s)
- Social Security number
- Employment (W-2) information
- 1099 information
- Direct-deposit bank account and routing numbers
- Any other details provided to the firm for tax preparation
Company’s Response
- Terminated the threat actor’s access and changed firm Electronic Filing Identification Number (EFIN)
- Installed advanced security software and changed login credentials
- Isolated affected systems and engaged cybersecurity experts for a comprehensive forensic investigation
- Coordinated with the IRS, state tax agencies, FBI, and U.S. Secret Service
- Requested additional records from its tax-software provider to support the investigation
Steps You Can Take Now
Guthmann Tax Services recommends that all affected taxpayers:
- Create or access an ID.me account at IRS.gov
- Obtain an Identity Protection PIN for additional filing security: Get an IP PIN
- Review the IRS identity-theft assistance process: IRS Victim Assistance
- Monitor all IRS correspondence for suspicious activity and immediately alert Guthmann Tax Services of any unusual notices
Legal Rights & Next Steps
Data-breach and consumer-protection laws may provide monetary remedies for individuals whose personal information has been compromised. Our investigation focuses on whether Guthmann Tax Services implemented reasonable cybersecurity measures and whether affected clients are entitled to damages, credit-monitoring, or identity-restoration services.
Free review: Submit your notice letter and speak with data-breach counsel to understand your options at no out-of-pocket cost.
Company Overview
- Website: guthmanntax.com
- Headquarters: 11040 W Bluemound Rd, Suite 200, Milwaukee, WI, USA
- Industry: Tax Return Preparation Services
- Year Founded: 2005
- Employee Count: 1
Frequently Asked Questions
When did the Guthmann Tax Services, Inc breach occur?
The unauthorized access took place between June 16 and June 18, 2025 and was discovered on June 25, 2025.
What data was potentially compromised in the Guthmann Tax Services, Inc breach?
Possible data points include Social Security numbers, W-2/1099 information, direct-deposit banking details, and other personal identifiers listed above.
Has Guthmann Tax Services, Inc offered credit monitoring?
The company’s notice focuses on IRS Identity Protection PINs rather than a traditional credit-monitoring product. Clients are encouraged to follow the IRS steps outlined in the notice.
How do I join the Guthmann Tax Services, Inc data breach lawsuit?
Complete a free case evaluation with qualified data-breach attorneys. They will review your individual circumstances and inform you of eligibility for any class or individual claims.
Will this affect my 2025 tax return?
If any suspicious activity arises, Guthmann Tax Services states it will notify clients immediately. Using an IP PIN adds another layer of security when you file.