(35 ILCS 625/4) (from Ch. 120, par. 1414)
    Sec. 4. Annual return, collection and payment. A return with respect to the tax imposed by this Act shall be made by every public utility for any taxable period for which such person is liable for such tax. Such return shall be made on such forms as the Department shall prescribe and shall contain the following information:
        1. Taxpayer's name;
        2. Address of taxpayer's principal place of business,
    
and address of the principal place of business (if that is a different address) from which the taxpayer engages in the business of distributing, supplying, furnishing or selling water in this State;
        3. The total proprietary capital and total long-term
    
debt as of the beginning and end of the taxable period as set forth on the balance sheets included in the taxpayer's annual report to the Illinois Commerce Commission for the taxable period;
        4. The taxpayer's base income allocable to Illinois
    
under Sections 301 and 304(a) of the "Illinois Income Tax Act", for the period covered by the return;
        5. The amount of tax due for the taxable period
    
(computed on the basis of the amounts set forth in Items 3 and 4); and
        6. Such other reasonable information as may be
    
required by forms or regulations prescribed by the Department.
    The returns prescribed by this Section shall be due and shall be filed with the Department not later than the 15th day of the third month following the close of the taxable period. The taxpayer making the return herein provided for shall, at the time of making such return, pay to the Department the remaining amount of tax herein imposed and due for the taxable period. Each taxpayer shall make estimated quarterly payments on the 15th day of the third, sixth, ninth and twelfth months of each taxable period. Such estimated payments shall be 25% of the tax liability for the immediately preceding taxable period or the tax liability that would have been imposed in the immediately preceding taxable period if this Act had been in effect. All moneys received by the Department under this Act shall be paid into the Personal Property Tax Replacement Fund in the State Treasury.
    Any taxpayer required to make payments under this Section may make the payments by electronic funds transfer. The Department shall adopt rules necessary to effectuate a program of electronic funds transfer.
(Source: P.A. 90-16, eff. 6-16-97.)