Form 8594 must also be filed if the purchaser or seller is amending an original or a previously filed supplemental Form. 8594 because of an increase or decrease.Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Enter your name and taxpayer identification number (TIN) at the top of the form. Then check the box for Purchaser or Seller. Access forms available from the Assessor's office, including benefits, business personal property, change in ownership, and other general forms. See Instructions Download PDF. First download the PDF form, then fill in requested information, print and mail it back to address listed on the form. To set up a new business account to file your Business Property Statement, please call for more information.