56 Ill. Adm. Code 2725.50
Electronic Signature
Section 2725.50
Electronic
Signature
An electronic submission, as defined by Section 2725.35,
that must be signed shall be signed using an electronic signature in lieu of a
written signature by clicking the "I Agree" check box beneath the
certification statement prior to submission on the MyTax Illinois website
(mytax.illinois.gov). An electronic submission has the same legal effect as a signature
on a paper document.