About William Martensen

Based in San Clemente, California, William Martensen is the owner of a San Juan Capistrano-based tax services provider. He started the company in 2008 and has since acquired approximately 600 clients. Over nearly two decades as a California business owner and enrolled agent, William Martensen has developed a full line of services that include tax planning, tax preparation, tax filing, conflict resolution, and audit representation for cases audited by the Internal Revenue Service. He also provides virtual consultations and company tax presentations.

William Martensen earned his accounting degree from the Eller College of Business at the University of Arizona. He has developed a reputation as a thoughtful and diligent accountant determined to help his clients avoid paying unnecessarily high taxes and problems with the IRS. He makes annual contributions to his alma mater and donations to groups such as Teen Challenge and the Salvation Army. He is also involved in several annual charity golf tournaments.