Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. 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.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. A taxable asset purchase allows the buyer to "step up," or increase, the tax basis of the acquired assets to reflect the purchase price. Instructions for Form 8594, asset acquisition statement under section 1060-journal.