What is the deadline for filing state taxes in Illinois?

In Illinois, the deadline for filing state income taxes typically coincides with the federal income tax deadline. For most taxpayers, this means that returns must be submitted by April 15 of each year. However, if April 15 falls on a weekend or a holiday, the deadline may be extended to the next business day. It is important to be aware that individuals who file for an extension may have until October 15 to complete their state tax returns, but they are still required to pay any taxes owed by the original due date to avoid penalties and interest. Additionally, taxpayers should ensure they adhere to any updates or changes that may be announced by the Illinois Department of Revenue, especially as tax laws and deadlines can occasionally change. To stay informed, it can be beneficial to visit the current web page for the Illinois Department of Revenue, as it provides the latest information on filing deadlines and requirements. Always consider checking this resource to confirm any specific dates for your particular situation.