Generally, both the purchaser and seller must file Form 8594 and attach it to their income tax returns (Forms 1040, 1041,. 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.If the purchaser or seller is a controlled foreign corporation (CFC), each U.S. shareholder should attach Form 8594 to its Form 5471. Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Coordinate on Allocation Values. The tax professional who comes into contact with such a situation should consider the need to file Form 8594, or to revise the valuation of specific assets. 1. Gather necessary documentation for the asset sale. Learn how to file form 8594 and when to file.