Our Sacramento accountants for income, estate, and gift tax compliance at Cook CPA Group can help you pay your taxes for these assets on time. Supplemental and Addenda assessment tax bill amounts are available online.Our Mission - We provide equitable, timely, and accurate property tax assessments and information. Learn more About Us. Our Values -. Professionalism. Integrity. The Assessor is responsible for locating taxable property in the county and determining its assessed value.