225 ILCS 645/17.1

Each licensee shall file annually with the Department a report on prescribed forms not later than April 15 following the calendar year end or, if the records are kept on a fiscal year basis, not later than 90 days after the close of his fiscal year. The Director on good cause shown, or on his own motion, may grant a reasonable extension of the filing date or may waive the filing of such reports in particular cases.