IL sales tax
Looks like you'll need 6.25% of purchase price. The statute makes no distinction from whom you bought it.Taken fro the IL Sales Tax statute:"The state sales tax in Illinois is assessed on three categories: 1) food and prescription and non-prescription drugs, 2) Vehicles, and 3) other general merchandise. Qualifying food, drug and medical appliance purchases are taxed at a base rate of 1%. Vehicles, or items that require a title and registration are taxed at a base rate of 6.25%. Other general merchandise is taxed at 6.25% and include sales of most tangible personal property including sales of soft drinks, prepared food including food purchased at restaurants, photo processing, prewritten or “canned” computer software, prepaid telephone calling cards and other prepaid telephone arrangements, and repair parts and other items transferred or sold in conjunction with providing a service."You can find more detail through a search on IL Municipal Sales Tax.PS Federal documentation does not eliminate the need to register with most states triggering the tax