Cook County - Treasurer's Office Forms and Documents
Cook County - Treasurer's Office is a county government treasurer's office in Cook County. The agency's form collection reflects a strong focus on property-tax matters, while its name identifies it as a county treasurer's office.
The forms listed here include property-tax abatement and refund applications, tax deferral and recovery documents, and an application for military personnel property tax relief. The collection also includes a public-records request form and third-party notification enrollment, distinct from the tax-related applications.
Cook County - Treasurer's Office forms
- IL-CC-TSO · Cook CountyApplication for Property Tax Abatement – Cook County, IL
The Application for Property Tax Abatement is the Cook County Board of Review form for surviving spouses of fallen police officers, firefighters, rescue workers and soldiers seeking a property tax rebate. Fill it out online on FillingPDF and download or print the PDF.
2 pages - IL-CC-TSO · Cook CountyCertificate of Error Refund Application – Cook County, IL
The Certificate of Error Refund Application is the Cook County Treasurer's form for claiming a property tax refund after an Assessor's Certificate of Error. Fill it out online on FillingPDF and download or print the completed PDF.
2 pages - IL-1017 · IL-CC-TSO · Cook CountyForm IL-1017, Application for Deferral of Real Estate/Special Assessment Taxes for Tax Year 2025 – Illinois
Form IL-1017 is the Illinois Department of Revenue application for deferring real estate and special assessment taxes for tax year 2025, distributed by the Cook County Treasurer's Office. Fill out the PDF online on FillingPDF and download or print it.
4 pages - IL-1018 · IL-CC-TSO · Cook CountyForm IL-1018 Real Estate/Special Assessment Tax Deferral and Recovery Agreement for Tax Year 2025 – Cook County, IL
Form IL-1018 is the Real Estate/Special Assessment Tax Deferral and Recovery Agreement for Tax Year 2025, used by senior homeowners applying through the Cook County Treasurer's Office. Fill it out online on FillingPDF and download or print the completed PDF.
2 pages - IL-CC-TSO · Cook CountyFreedom of Information Request Form – Cook County, IL
The Freedom of Information Request Form is the Cook County Treasurer's Office form for asking to inspect or copy public records under the Freedom of Information Act. Fill it out online on FillingPDF and download or print the completed PDF.
1 page - IL-CC-TSO · Cook CountyMilitary Personnel Property Tax Relief Application – Cook County, IL
The Military Personnel Property Tax Relief Application is a Cook County Treasurer's Office form for active-duty service members to defer real estate taxes. Fill it out online on FillingPDF and download or print the completed PDF.
1 page - IL-CC-TSO · Cook CountyProperty Tax Appeal Board (PTAB) – Refund Application – Cook County, IL
The Property Tax Appeal Board (PTAB) Refund Application is the Cook County Treasurer's form for requesting a refund after a PTAB decision reduced the tax on a PIN. Fill it out online on FillingPDF and download or print the completed PDF.
2 pages - IL-CC-TSO · Cook CountySinopsis: Un sistema roto de apelaciones al impuesto a la propiedad – Cook County, IL
The Sinopsis is the Spanish-language synopsis of a May 2025 study by Cook County Treasurer Maria Pappas on how property tax appeals shift tax burden to homeowners. View and download the PDF on this page.
3 pages - IL-CC-TSO · Cook CountyThird-Party Notification Enrollment – Cook County, IL
The Third-Party Notification Enrollment is a Cook County Treasurer's Office form that names another person or organization to be contacted if the owner's property taxes become delinquent. Fill it out online and download the PDF.
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About the Cook County - Treasurer's Office
The forms currently listed for Cook County - Treasurer's Office are centered on property-tax adjustments and relief. The collection includes an application for property tax abatement and two kinds of refund paperwork: a Certificate of Error Refund Application and a Property Tax Appeal Board (PTAB) Refund Application. Their titles distinguish a refund request connected with a certificate of error from one associated with the PTAB; they should not be treated as interchangeable based on the titles alone.
Tax deferral documents form another group. The collection includes an application to defer real estate or special assessment taxes and a separate deferral and recovery agreement. Both listed documents identify tax year 2025, so users should check whether those versions apply to their circumstances. A military personnel property tax relief application is also represented. Beyond tax applications, the catalog includes a Freedom of Information Request Form and Third-Party Notification Enrollment, which address different document needs. A synopsis about a broken property-tax appeals system is also included.
This FillingPDF collection reflects published forms associated with the office, not necessarily every document it issues. Before relying on a form, confirm the current version and the issuing agency's instructions, including any applicable deadlines, supporting-document requirements, fees, or submission methods.