Where to mail il state tax return

In Illinois, you can mail your state income tax return to the following address:

Illinois Department of Revenue PO Box 19032 Springfield, IL 62794-9032

Make sure to use the correct mailing address for your specific situation:

• If you're filing a paper return, use the above PO box address.
• If you're filing an electronic return, you don't need to mail anything. You can simply submit your return online through the Illinois Department of Revenue's website.
• If you're filing a joint return, you can use either the PO box address or the address of one of the taxpayers.

It's also important to note that you should keep a copy of your return and supporting documents for your records.