35 ILCS 120/5j
If any taxpayer, outside the usual course of his business, sells or transfers the major part of any one or more of (A) the stock of goods which he is engaged in the business of selling, or (B) the furniture or fixtures, (C) the machinery and equipment, or (D) the real property, of any business that is subject to the provisions of this Act, the purchaser or transferee of such asset shall, no later than 10 business days prior to the sale or transfer, file a notice of sale or transfer of business assets with the Department disclosing the name and address of the seller or transferor, the name and address of the purchaser or transferee, the date of the sale or transfer, a copy of the sales contract and financing agreements which shall include a description of the property sold, the amount of the purchase price or a statement of other consideration for the sale or transfer, the terms for payment of the purchase price, and such other information as the Department may reasonably require. If the purchaser or transferee fails to file the above described notice of sale with the Department within the prescribed time, the purchaser or transferee shall be personally liable for the amount owed hereunder by the seller or transferor to the Department up to the amount of the reasonable value of the property acquired by the purchaser or transferee. The seller or transferor shall pay the Department the amount of tax, penalty and interest (if any) due from him under this Act up to the date of the payment of tax. The seller or transferor, or the purchaser or transferee, at least 10 business days before the date of the sale or transfer, may notify the Department of the intended sale or transfer and request the Department to audit the books and records of the seller or transferor, or to do whatever else may be necessary to determine how much the seller or transferor owes to the Department hereunder up to the date of the sale or transfer. The Department shall take such steps as may be appropriate to comply with such request.
Any order issued by the Department pursuant to this Section to withhold from the purchase price shall be issued within 10 business days after the Department receives notification of a sale as provided in this Section. The purchaser or transferee shall withhold such portion of the purchase price as may be directed by the Department, but not to exceed a minimum amount varying by type of business, as determined by the Department pursuant to regulations, plus twice the outstanding unpaid liabilities and twice the average liability of preceding filings times the number of unfiled returns, to cover the amount of all tax, penalty and interest due and unpaid by the seller or transferor under this Act or, if the payment of money or property is not involved, shall withhold the performance of the condition that constitutes the consideration for the sale or transfer. Within 60 business days after issuance of the initial order to withhold, the Department shall provide written notice to the purchaser or transferee of the actual amount of all taxes, penalties and interest then due and whether or not additional amounts may become due as a result of unfiled returns, pending assessments and audits not completed. The purchaser or transferee shall continue to withhold the amount directed to be withheld by the initial order or such lesser amount as is specified by the final withholding order or to withhold the performance of the condition which constitutes the consideration for the sale or transfer until the purchaser or transferee receives from the Department a certificate showing that such tax, penalty and interest have been paid or a certificate from the Department showing that no tax, penalty or interest is due from the seller or transferor under this Act.
The purchaser or transferee is relieved of any duty to continue to withhold from the purchase price and of any liability for tax, penalty or interest due hereunder from the seller or transferor if the Department fails to notify the purchaser or transferee in the manner provided herein of the amount to be withheld within 10 business days after the sale or transfer has been reported to the Department or within 60 business days after issuance of the initial order to withhold, as the case may be. The Department shall have the right to determine amounts claimed on an estimated basis to allow for non-filed periods, pending assessments and audits not completed, however the purchaser or transferee shall be personally liable only for the actual amount due when determined.
If the seller or transferor fails to pay the tax, penalty and interest (if any) due from him hereunder and the Department makes timely claim therefor against the purchaser or transferee as hereinabove provided, then the purchaser or transferee shall pay the amount so withheld from the purchase price to the Department. If the purchaser or transferee fails to comply with the requirements of this Section, the purchaser or transferee shall be personally liable to the Department for the amount owed hereunder by the seller or transferor to the Department up to the amount of the reasonable value of the property acquired by the purchaser or transferee.
Any person who shall acquire any property or rights thereto which, at the time of such acquisition, is subject to a valid lien in favor of the Department shall be personally liable to the Department for a sum equal to the amount of taxes secured by such lien but not to exceed the reasonable value of such property acquired by him.
35 ILCS 120/5j