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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.

How does Illinois tax a Limited Liability Company (LLC)?

If you are an LLC, the tax return you file with Illinois depends on how you have elected to be treated with the Internal Revenue Service (IRS).

If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.