Robert L. Sewall, CPA Share: Accountants Certified-Public Robert L. Sewall, CPA 1122 Grant Ave. Novato, CA 94945 (415) 897-0733 (415) 897-9396 (fax) About About Non-profit organization audits, preparation of financial statements, business tax returns, indivuduals, estates and trust tax preparation and planning - full service accounting firm.