Matching Federal Guidelines for Tax Return Extensions for Corporations and Partnerships

Beginning with 2016, Congress changed the due date for corporate returns from March 15 to April 15 while flipping the requirement from April 15 to March 15 for partnerships. Old regulations automatically allowed for taxpayers to receive a 6 or 7 month extension effectively stretching the deadline to an October 15 due date. With the change in the federal due dates, the Illinois Department of Revenue (IDOR) is allowing taxpayers to receive automatic extensions of the due date for filling returns until October 15 to provide continuity in the expectations and due dates.