The Illinois Department of Revenue (IDOR) urged taxpayers on April 7 to submit their 2025 state individual income tax returns as soon as possible, highlighting the approaching April 15 filing deadline.
The department said that acting early can help avoid potential delays, especially for those choosing to file by mail. IDOR emphasized the importance of not waiting until the last minute to ensure timely processing and reduce stress for both taxpayers and state agencies.
In its announcement, IDOR encouraged residents to prepare their documents ahead of time and take advantage of available resources for assistance. The department noted that early filing can also help individuals identify any issues or missing information before the deadline passes.
As the tax season reaches its final week, IDOR’s reminder serves as a prompt for Illinois residents to review their filings and avoid penalties associated with late submissions. No additional background or policy changes were included in this announcement.
Looking ahead, IDOR continues to advise taxpayers to seek support if needed and use electronic filing options when possible.



