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Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems. We are aware of this issue and are diligently working on restoration.

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Electronic Filing Forms

Name
 Description
IL-8453 Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2023.
IL-8453 Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2022.
IL-8453​
 ​Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2021.
​IL-8453

 Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2020.​
​IL-8453

 ​Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2019.
IL-8453
 Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2018
IL-8453
 Illinois Individual Income Tax Electronic Filing Declaration
Note: For tax year 2017.
IL-8633-B
 Business Electronic Filing Enrollment
IL-8655
 Reporting Agent Electronic Services Authorization
IL-8948 Illinois Electronic Filing Opt-Out Declaration