Retailers reporting sales of general merchandise and qualifying food, drugs, and medical appliances must file Form ST-1, Sales and Use Tax and E911 Surcharge Return. A monthly return is due the 20th day of the month following the month for which the return is filed.
Illinois does not tax sales of service. Illinois does impose service occupation tax on items of tangible personal property transferred as an incident to sales of service.
Professional services are not taxable in the state of Illinois unless it results in a product that is sold.
A construction contractor does not need to collect sales tax when incorporating tangible personal property into real estate under a construction contract. In this scenario, Illinois law considers the construction contractor the end user of the items permanently incorporated into real estate.
Charitable, religious, educational, or government organizations. However, exemptions for charitable organizations vary in scope and requirements.