35 ILCS 135/11
Every distributor, who is required or authorized to collect tax under this Act, but who is not a manufacturer of cigarettes in original packages which are contained in a sealed transparent wrapper, shall, on or before the 15th day of each calendar month, file a return with the Department, showing such information as the Department may reasonably require. Information that the Department may reasonably require includes information related to the uniform regulation and taxation of cigarettes. The Department may promulgate rules to require that the distributor's return be accompanied by appropriate computer-generated magnetic media supporting schedule data in the format required by the Department, unless, as provided by rule, the Department grants an exception upon petition of a distributor.
Illinois manufacturers of cigarettes in original packages which are contained inside a sealed transparent wrapper shall file a return by the 5th day of each month covering the preceding calendar month. Each such return shall be accompanied by the appropriate remittance for tax as provided in Section 3 of this Act. Each such return shall disclose such information as the Department may lawfully require. Information that the Department may lawfully require includes information related to the uniform regulation and taxation of cigarettes. Each such return shall be accompanied by a copy of each invoice rendered by such manufacturer to any purchaser to whom such manufacturer delivered cigarettes (or caused cigarettes to be delivered) during the period covered by the return. The Department may promulgate rules to require that the manufacturer's return be accompanied by appropriate computer-generated magnetic media supporting schedule data in the format required by the Department, unless, as provided by rule, the Department grants an exception upon petition of a manufacturer.
No distributor shall be required to return information to the extent to which the reporting of such information would be a duplication of such distributor's reporting of information in any return which he is required to file with the Department under the Cigarette Tax Act. Returns shall be filed on forms prescribed by the Department.
35 ILCS 135/11