Most business owners will be able to take full advantage of e-filing. You may upload documentation to prove your claim.Have the tax bill in front of you, as it contains information necessary to complete the E-Form. If you are unable to file electronically, please call our office at (510) 272-3848 and a BPS will be mailed to you. Please choose one of the following tax types. Can the county assessor prorate assessments or taxes between the buyer and seller of taxable personal property? Provides the detail for the tax rate used in calculating that portion of your property tax bill based on the assessed value of your property. Obtain forms from either the County Assessor or the Clerk of the Board in the county where the property is located). Find information and due dates for unsecured personal and unsecured supplemental property taxes. The 2024 business personal property listing form and instructions is for any individual(s) or business(es) owning or possessing personal property.