The deadline for filing federal income tax returns that have received an extension is October 15, 2025. This extension is granted if the taxpayer files Form 4868 by the original April 15, 2025 deadline. It is important to note that the extension gives more time to file the return but does not extend the time to pay any taxes owed, which are still due by April 15, 2025. Regarding state income tax returns, for example, Illinois aligns with the federal extension and grants an automatic six-month extension to file, also making October 15, 2025, the extended deadline if a federal extension is received. Arkansas, however, due to specific disaster-related relief, extended the deadline for filing state returns to December 3, 2025, for those affected, which is one month beyond the extended federal deadline. In summary:
- Federal tax returns with an extension are due by October 15, 2025.
- State deadlines generally align with federal extensions but can vary; for instance, Illinois follows October 15, 2025, while Arkansas has a special extension until December 3, 2025, due to disaster relief.