235 ILCS 5/8-10
It is the duty of each manufacturer, importing distributor and foreign importer to keep, at his licensed address or place of business, complete and accurate records of all sales or other dispositions of alcoholic liquor, and complete and accurate records of all alcoholic liquor produced, manufactured, compounded or imported, whether for himself or for another, together with a physical inventory made as of the close of each period for which a return is required, covering all alcoholic liquors on hand. However, the Department of Revenue may grant an importing distributor a waiver to permit such records to be kept at a central business location within the State upon written request by the importing distributor. The central business location shall be located at a licensed importing distributor's premises. The Department of Revenue may in its discretion prescribe reasonable and uniform methods for keeping such records by manufacturers and importing distributors and foreign importers.
In case of failure by manufacturers and importing distributors to keep such records or to make them available to the Department on demand, the Department shall determine the amount of tax due according to its best judgment and information, which amount so determined by the Department shall be prima facie correct, and the Department's notice of tax liability shall be given, and protest thereto and demand for a hearing may be made and final assessments arrived at, in accordance with the provisions of Section 8-5 hereof.
It is the duty of each manufacturer, importing distributor and foreign importer, who imports alcoholic liquor into the State, and each non-resident dealer who ships alcoholic liquor into the State, to mail to the Department one duplicate invoice, together with a bill of lading, covering such shipment and stating the quantity and, except in the case of alcoholic liquor imported in bulk to be bottled by an authorized licensee in this State using his own label and brand, the invoice shall also state the brand, labels and size of containers.
It is the duty of each manufacturer, importing distributor and foreign importer, who imports spirits into the State, and each non-resident dealer who ships spirits into the State, to mail to the State Commission monthly a report containing a compilation of the information required to be furnished to the Department by the preceding paragraph, except that information concerning spirits imported in bulk need not be included. The report shall include all information mailed to the Department during the preceding month.
All books and records, which manufacturers, importing distributors, non-resident dealers and foreign importers are required by this Section to keep, shall be preserved for a period of 3 years, unless the Department, in writing, authorizes their destruction or disposal at an earlier date.
235 ILCS 5/8-10