Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. 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. Pursuant to Section 1060, both the buyer and the seller must file Form8594 (Asset. Required to assume the liabilities of AHS related to the operation of hospitals and clinics. A. Net Patient Service Revenue.