Ill. Admin. Code tit. 86, § 195.145
c) Tips received by persons parking cars for operators providing valet services are not subject to the tax imposed by the Act if the tips are retained by the person receiving the tip. If the tips are turned over to the valet business, the tips shall be included in the purchase price. (Section 10-40(c) of the Act)
EXAMPLE: A restaurant provides parking without charge. For the benefit of customers, the owner of the restaurant has employees park the cars for the customers. Customers often tip the employees for parking and returning their cars. The employees get to keep the tips. The tips are not taxable under this Act.