86 Ill. Adm. Code 750.700
Payment Transmission Errors
Section 750
Section 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.