(35 ILCS 505/2b) (from Ch. 120, par. 418b)
    Sec. 2b. In addition to the tax collection and reporting responsibilities imposed elsewhere in this Act, a person who is required to pay the tax imposed by Section 2a of this Act shall pay the tax to the Department by return showing all fuel purchased, acquired or received and sold, distributed or used during the preceding calendar month including losses of fuel as the result of evaporation or shrinkage due to temperature variations, and such other reasonable information as the Department may require. Losses of fuel as the result of evaporation or shrinkage due to temperature variations may not exceed 1% of the total gallons in storage at the beginning of the month, plus the receipts of gallonage during the month, minus the gallonage remaining in storage at the end of the month. Any loss reported that is in excess of this amount shall be subject to the tax imposed by Section 2a of this Law. On and after July 1, 2001, for each 6-month period January through June, net losses of fuel (for each category of fuel that is required to be reported on a return) as the result of evaporation or shrinkage due to temperature variations may not exceed 1% of the total gallons in storage at the beginning of each January, plus the receipts of gallonage each January through June, minus the gallonage remaining in storage at the end of each June. On and after July 1, 2001, for each 6-month period July through December, net losses of fuel (for each category of fuel that is required to be reported on a return) as the result of evaporation or shrinkage due to temperature variations may not exceed 1% of the total gallons in storage at the beginning of each July, plus the receipts of gallonage each July through December, minus the gallonage remaining in storage at the end of each December. Any net loss reported that is in excess of this amount shall be subject to the tax imposed by Section 2a of this Law. For purposes of this Section, "net loss" means the number of gallons gained through temperature variations minus the number of gallons lost through temperature variations or evaporation for each of the respective 6-month periods.
    The return shall be prescribed by the Department and shall be filed between the 1st and 20th days of each calendar month. The Department may, in its discretion, combine the returns filed under this Section, Section 5, and Section 5a of this Act. The return must 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 taxpayer. If the return is filed timely, the seller shall take a discount of 2% through June 30, 2003 and 1.75% thereafter which is allowed to reimburse the seller for the expenses incurred in keeping records, preparing and filing returns, collecting and remitting the tax and supplying data to the Department on request. The discount, however, shall be applicable only to the amount of payment which accompanies a return that is filed timely in accordance with this Section.
(Source: P.A. 92-30, eff. 7-1-01; 93-32, eff. 6-20-03.)