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Tax Forms
Access to Illinois tax forms is provided through the categories listed below. Select a category to view and download forms.
Fillable Form Instructions
Download: Right‑click the link and select “Save link as…”, then open the file in Acrobat Reader or Acrobat for full functionality.
Notice: Fillable forms do not work correctly in most web browsers. Even if a form appears to open, some functionality will be lost. Additional help is available on the Fillable Forms Step-by-Step Instructions and Troubleshooting Guide pages.