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.Both the seller and purchaser of a group of assets that makes up a trade or business must use Form 8594 to report such a sale. Enter your name and taxpayer identification number (TIN) at the top of the form. Then check the box for Purchaser or Seller. We purchased a business in March 2019 with inventory (independent valuation), equipment (value specified in the purchase contract) and goodwill. Learn how to file form 8594 and when to file.