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. Locate the closest Taxpayer Assistance Center to you. The buyer of business assets and the seller must independently report to the IRS the purchase price allocations that both use. â–¶ Attach to your income tax return.