A seller must give all prospective purchasers Form TP153, Notice to Prospective Purchasers of a Business or Business Assets. If the business you are buying includes business assets such as furniture or office equipment, you must pay sales tax on them.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. Use a Business Bill of Sale to set out the terms for the sale of a business and transfer the ownership and all assets to the buyer. Thus, both the Buyer and Seller must complete this application. A business sale agreement is a legal document that describes and records the price and other details when a business owner sells the business. 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.