Illinois State Tax Forms & Schedules for 2026
The tax forms on this page can be essential for your Illinois state tax return. Each form automatically calculates the relevant deductions and tax amounts based on the 2026 Illinois State tax tables.
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Illinois Tax Forms
The tax forms below are for Illinois State tax return calculations. Each form will automatically calculate the relevant tax deductions and amount based on the 2026 Illinois State tax tables
Browse the essential Illinois (IL) tax forms used for personal and business income tax filing. Common examples include Form IL-1040 (Individual Income Tax Return) and Schedule M (Other Additions and Subtractions), along with credits, withholding, and estimated payment schedules supporting Illinois taxpayers.
- Illinois Tax Form IL-1040
Individual Income Tax Return - Illinois Tax Form IL-1040-ES
Estimated Income Tax Payments For Individuals - Illinois Tax Form IL-1040-V
Payment Voucher For Individual Income Tax - Illinois Tax Form IL-1040-X
Amended Individual Income Tax Return - Illinois Tax Form IL-1040-SCHEDULE-CR
Credit For Tax Paid To Other States - Illinois Tax Form IL-1040-SCHEDULE-FD
Tax On Federally Taxed Distributions - Illinois Tax Form IL-1040-SCHEDULE-G
Voluntary Charitable Donations - Illinois Tax Form IL-1040-SCHEDULE-G-L
Voluntary Charitable Donations For Lottery Winnings - Illinois Tax Form IL-1040-SCHEDULE-ICR
Illinois Credits - Illinois Tax Form IL-1040-SCHEDULE-IL-E-EITC
Earned Income Credit - Illinois Tax Form IL-1040-SCHEDULE-K-1-P
Partner’s Or Shareholder’s Share Of Income - Illinois Tax Form IL-1040-SCHEDULE-K-1-T
Beneficiary’s Share Of Income - Illinois Tax Form IL-1040-SCHEDULE-M
Additions And Subtractions - Illinois Tax Form IL-1040-SCHEDULE-NR
Nonresident And Part Year Resident - Illinois Tax Form IL-1040-SCHEDULE-NR-AP
Apportionment Detail For Nonresidents - Illinois Tax Form IL-1040-SCHEDULE-VDA
Voluntary Disclosure Agreement Form - Illinois Tax Form IL-1040-SCHEDULE-1299-A
Tax Subtraction And Credit Summary - Illinois Tax Form IL-1040-SCHEDULE-1299-C
Recapture Of Credits - Illinois Tax Form IL-1040-SCHEDULE-1299-DA
Credit For Tax Paid To Other States – Detail - Illinois Tax Form IL-W-4-NR
Nonresident Employee Withholding Certificate - Illinois Tax Form IL-941
Illinois Withholding Income Tax Return - Illinois Tax Form IL-1299-C
Tax Credit Recapture Schedule - Illinois Tax Form IL-2210
Computation Of Penalties For Individuals - Illinois Tax Form IL-4562
Depreciation And Amortization Adjustments - Illinois Tax Form IL-WIT
Illinois Income Tax Withheld - Illinois Tax Form IL-F
Gains From Sales Or Exchanges Of Property Acquired Before August 1, 1969 - Illinois Tax Form IL-SA
Specific Accounting Schedule (fiscal Year Filers) - Illinois Tax Form IL-W-4
Employee’s Illinois Withholding Allowance Certificate
Tip: Use the Illinois Tax Calculator to fine-tune your refundable and non-refundable tax credits. Complete, calculate, print, and save your tax calculation for later use.
Frequently Asked Questions
Quick answers for Illinois filers: flat-rate state tax, federal coordination, deductions, dependents, and withholdings.
Mortgage vs take-home planning
Try the Mortgage Calculator and revisit this IL page.
Where do I mail the completed IL-1040-V and payment?
Mail the completed voucher and payment to the address printed on the voucher (Illinois Department of Revenue, Springfield IL 62726-0001) unless told otherwise during filing.
Do charitable gifts affect IL tax?
IL doesn’t mirror federal itemized deductions; charitable gifts matter federally, not typically for IL base.
Why don’t my payroll brackets match?
Employer systems use rounding/timing and supplemental methods; small variances are normal.
Does Illinois tax Social Security or pension income?
No. Illinois exempts most retirement income—including Social Security, pensions, and IRA withdrawals—from state income tax. These subtractions are reported on Schedule M.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.