Express Income Tax Service is a Rohnert Park tax and accounting practice associated with Dan Peterson, identified in the source as founder and president. The firm serves tax clients with income tax preparation and planning support, and the source describes more than 20 years of assisting clients with tax preparation and planning concerns.

The practice also offers bookkeeping, payroll, and small business accounting, with QuickBooks-related help listed among its service areas. Its public materials include resources for tax due dates, tax forms, refund tracking, financial guides, and a client portal, supporting individuals and small businesses looking for organized tax and accounting assistance.