Illinois allows an automatic extension to October 15 without filing a form. If the taxpayer receives a federal extension of more than six months, the taxpayer is automatically allowed that extension for Illinois.
To access the Illinois Extension Payment, from the main menu of the Illinois state return, select:
- Miscellaneous Forms
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IL505I Automatic Extension Payment For Individuals - Answer Yes to completing the form.
Note: Electronic filing is not supported for the state extension payment. The federal extension payment may be sent electronically, however the state extension payment will have to be mailed.
Additional Information: