Squar Milner LLP experienced a data breach where credentials required to access a client tax return system were compromised. The incident was discovered on March 25, 2020, with the breach date listed as February 5, 2020. Affected data included names, addresses, Social Security numbers, Tax ID numbers, and prior IRS/state tax filing information. The firm secured the system, notified the FBI, CFTB, and IRS, and offered 12 months of credit monitoring and identity theft restoration services to affected individuals.