Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Line 1: Enter the name, address, and Tax Identification Number (TIN) of the other party (either the purchaser or seller).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. 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. File Form 8594, Asset Acquisition Statement. The instructions explain the "Class" concept. 4. – Both the purchaser and seller are required to file Form 8594.