Walker Accounting & Tax Service Data Breach Exposes Sensitive Client Information In April 2026, Walker Accounting & Tax Service, a South Carolina-based firm, disclosed a data breach involving unauthorized network access and fraudulent tax filings. The company detected suspicious activity on its systems and launched an investigation, confirming that attackers had exfiltrated sensitive client data. The breach exposed personal information, including names, Social Security numbers, driver’s licenses, financial account details, taxpayer identification numbers, and medical records. A total of 3,304 South Carolina residents and four Massachusetts residents were affected. As part of its response, Walker Accounting is offering affected individuals 24 months of free credit monitoring and identity restoration services through Experian IdentityWorks. The enrollment deadline is July 31, 2026. The service includes credit reports, daily monitoring, identity theft insurance, and extended support via Experian’s ExtendCare program. For assistance, impacted individuals can contact Walker’s dedicated helpline or mail inquiries to the company’s Walterboro headquarters. The incident highlights the risks of cyber threats targeting financial and tax preparation services.