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.Go to Screen 65, Asset Acquisition Statement (8594) (Screen 58 for S-Corp). Who Must File Form 8594? Both the seller and purchaser of a group of assets that make up a trade or business need to file Form 8594. Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Initially, franchise and excise tax was levied solely upon the privilege of engaging in business in the corporate form.