You are required to report all sales of businesses to the Illinois Department of Revenue. Disclosure of this information is REQUIRED.Form ST-556-D must be filed electronically using MyTax Illinois. Asset purchase agreements can be a useful way to create a new business while leaving unwanted resources and potential issues with the seller. As a result, whenever a business sells its assets, the seller must allocate the purchase price among the various assets in order to determine the amount. Forms of accepted payment are: credit card, certified check, cashier's check, money order, Illinois attorney check, or certified public accountant's check. The Supreme Court Commission on Access to Justice has approved the following forms. All Illinois Courts must accept these forms. A sale, lease, exchange, or other disposition of all, or substantially all, the property and assets, with or without the good will, of a corporation,