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. Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Enter your name and taxpayer identification number (TIN) at the top of the form. Then check the box for Purchaser or Seller. The purpose of this section is to prescribe an approach to allocate a lump sum purchase or sales price among various assets purchased or sold. The way the allocation is done is spelled out in the regulations. Online Filing Instructions. 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.