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Licensing IL

IL Business Registration

Source: IL Secretary of State Verified: March 1, 2026

Illinois businesses must register with the Secretary of State before conducting business. Sole proprietors using a trade name must file an assumed name certificate with the county clerk and publish notice in a local newspaper. Businesses with employees must register with the Department of Revenue for withholding accounts.

Official Source:
IL Secretary of State
Always verify current information directly with this agency.

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