You must submit a paper filing and a supplemental form to the Assessor's Office. Both forms are on our e-filing site.The purchase and sale agreement for the business entity or assets is a vital document. The most Santa Clara County, California businesses for sale listings including franchises, opportunities and businesses. An asset sale is a common method for transferring business ownership. Browse 558 CA Business Assets for sale on BizBuySell. Find currently operating CA businesses for sale from restaurants to service businesses. Whenever you buy, sell, or discontinue a business, you need to contact CDTFA.