Illinois DOR Forms
Browse source-backed illinois dor forms with fillable PDF workflows, official source links, and filing context for common document tasks.
Use current Illinois DOR forms
These listings prioritize indexable, source-backed form pages with clear descriptions and official filing context. Confirm the final submission method with the issuing source before sending sensitive information.
Filing checklist
- Confirm the current Illinois DOR form edition before filing.
- Review official instructions for fees, deadlines, signatures, and submission channels.
- Keep a copy of the completed PDF and any official confirmation or receipt.
6 Illinois DOR Forms
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IL-1040 (Illinois)(2024)
Individual Income Tax Return
Illinois individual income tax return for full-year and part-year residents. The primary form for filing Illinois state income taxes.
IL-1040-ES (Illinois)(2024)
Estimated Income Tax Payment
Illinois estimated income tax payment voucher for individuals making quarterly estimated tax payments.
IL-1040-X (Illinois)(2024)
Amended Individual Income Tax Return
Illinois amended individual income tax return for correcting previously filed IL-1040 returns.
IL-2210 (Illinois)(2024)
Computation of Penalties for Individuals
Illinois form for computing penalties for underpayment of estimated individual income tax.
IL-505-I (Illinois)(2024)
Automatic Extension Payment
Illinois automatic extension payment voucher for individual income tax. Used to make a payment with an extension request.
Schedule IL-E/EIC (Illinois)(2024)
Illinois Exemption and Earned Income Credit
Illinois schedule for claiming personal exemptions and the Illinois Earned Income Credit on the IL-1040.