A seller must give all prospective purchasers Form TP153, Notice to Prospective Purchasers of a Business or Business Assets. Find info on the process of selling a business and business lawyers with NYC Bar.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. Investment capital does not include those stocks, bonds or other securities that are held for sale to customers in the regular course of business. Both the buyer and seller must complete IRS Form 8594 during the sale to report the sale and purchase of business assets.