Tangible personal property owned, claimed, possessed, or controlled in the conduct of a profession, trade, or business may be subject to property taxes. If you are doing business in California, you are subject to our tax laws.We consider you to be "doing business" if you meet any of the following: That is, unless otherwise exempted, all forms of tangible property are taxable in California and the Assessor is required to assess business personal property. Business Personal Property is reported to the Assessor annually on a form known as the Business Personal Property Statement Form 571 or BPS. General information for owners about business property assessments and filing the Business Property Statement (Form 571-L). Tangible Personal Property. Business Personal Property Forms. The homeowner must make a simple one-time filing with the county assessor for the exemption.