Ill. Admin. Code. tit 86, § 750.700 - Payment Transmission Errors

a) If a taxpayer does not make a correct payment of tax for a particular period, such taxpayer shall, on the nearest business day to the date on which the error is discovered, contact the Department's Electronic Funds Transfer EFT unit.

b) If the taxpayer error involves an underpayment of tax, the taxpayer must make appropriate arrangements to initiate payment for the amount of the underpayment and penalties and interest.

c) A failure to initiate an electronic funds transfer payment on or before the due date because of circumstances under the taxpayer's control, including but not limited to insufficiency of funds in the taxpayer's account or a direct payment to the Department using an unauthorized payment method, may result in either the loss of discount, the imposition of penalties and interest, or both.

(Source: Amended at 30 Ill. Reg. 11583, effective June 26, 2006)