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. City or town, state, and ZIP code Form8594 (Rev. 10-2002)For Paperwork Reduction Act Notice, see separate instructions. Cat. Income Tax Procedures and Rulings. These instructions may refer to the department's income tax procedures and rulings for more information. This form called the Statement of Specified Foreign Financial Assets, has become essential for those who must disclose their holdings to the IRS.