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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.

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