Does Illinois require state 1099 tax filing?
Maybe. As the payer, you are required to maintain withholding income tax Forms 1099 in your records for a period of three years from the due date or payment of the tax, whichever is later. You are not required to file your 1099s with the Illinois Department of Revenue unless they specifically request them.
Does Illinois participate in Combined Federal/State Filing?
No, Illinois does not participate in Combined Federal/State Filing. Should the Illinois Department of Revenue request your 1099s, you must file with them directly.
What is the responsible state agency?
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