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 goodwill or going concern value. Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity.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. Both buyer and seller fill out Form 8594 on their respective tax returns showing the allocation. Taxable Stock Sales. Did you buy or sell a business during the tax year? If so, you may need to file IRS Form 8594 with your federal tax return.