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 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. As the buyer of a business, you could be liable for the unpaid taxes of the business. – Both the purchaser and seller are required to file Form 8594. – The Form 8594 must be attached to each filer's timely filed Federal income tax return. A taxable asset purchase allows the buyer to "step up," or increase, the tax basis of the acquired assets to reflect the purchase price. The sum of the amounts allocated to Classes IV and V are reported in the aggregate on Form 8594. See Appendix A; see also T.D. 8711 (Jan.