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https://www2.illinois.gov/business/registration-licenses-permits/IDOR/Business Registration-taxes-revenue
Business Registration
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Learn more about registration requirements for Illinois businesses.
https://www2.illinois.gov/business/manage-your-business/SOS/llc-name
Corporate & Limited Liability Company (LLC) Name Search
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Corp and LLC Certificate of Good Standing allows you to search for information regarding corporations, not-for-profit corporations, limited partnerships, limited liability companies and limited liability partnerships, as well as, other business-related information.
https://www2.illinois.gov/business/registration-licenses-permits/DCEO/start-business
Start a Business
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We offer a wide range of resources for those looking to start a business any where in Illinois. Find information on all the help we offer here
https://www2.illinois.gov/business/manage-your-business/SOS/locate-reg-bus-names
Locate Registered Business Names
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On here twice: Corp and LLC Certificate of Good Standing allows you to search for information regarding corporations, not-for-profit corporations, limited partnerships, limited liability companies and limited liability partnerships, as well as, other business-related information.
https://www2.illinois.gov/business/manage-your-employees/IDOR/unemployment-wage-withholding
Unemployment Tax, Wage Reports, & Withholding Filing
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File your Employer’s Quarterly Contribution and Wage Report (UI-3/40) online with Illinois Taxnet.
https://www2.illinois.gov/business/registration-licenses-permits/IDOR/business-tax-registration
Business Tax Registration Online
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File your Illinois Business Registration Application online with MyTax Illinois
https://www2.illinois.gov/business/manage-your-business/GOV/illinois-business-information
Illinois Business Information
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Links to information and resources for starting, running, expanding, relocating, or closing a business
https://www2.illinois.gov/business/manage-your-business/SOS/llc-filings
Corporation & Limited Liability Corporation Online Filings
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Business Services Home Page allows you to access the areas of Business Services and their forms.
https://www2.illinois.gov/business/registration-licenses-permits/CMS/register-sell-state
Register, Become a Vendor, & Sell to State Government
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https://www2.illinois.gov/business/registration-licenses-permits/IDOR/pay-business-taxes
Register to Pay Business Taxes
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Electronically file your original Individual Income Tax Return with MyTax Illinois.
https://www2.illinois.gov/business/registration-licenses-permits/ILCC/Liquor License Forms and Applications
Liquor License Forms and Applications
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Access ILCC forms and applications online.
https://www2.illinois.gov/business/manage-your-business/IDOR/business-tax-account
Business Tax Account Summary
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View e-Services available for businesses.

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https://www2.illinois.gov/agencies/CDB
Capital Development Board
Capital Development Board oversees the design and construction of state-funded facilities.
https://www2.illinois.gov/agencies/IDOA
Agriculture, Department of
The Illinois Department of Agriculture will be an advocate for Illinois' agricultural industry and provide the necessary regulatory functions to benefit consumers, agricultural industry, and our natural resources. The agency will strive to promote agri-business in Illinois and throughout the world.
https://www2.illinois.gov/agencies/IHDA
Housing Development Authority
The Illinois Housing Development Authority (IHDA) finances the creation and preservation of affordable housing throughout the State of Illinois to increase the supply of decent and safe places for people of low and moderate means to live. IHDA is an independent, self-supporting state agency that issues bonds based on its own strong credit rating to raise private capital to finance affordable housing. In addition, IHDA oversees and allocates federal and state resources to community partners to offer affordable mortgages to homebuyers and construction loans and grants to developers of multifamily rental properties. Since its creation in 1967, IHDA has allocated more than $15 billion and financed approximately 250,000 affordable housing units for residents of Illinois
https://www2.illinois.gov/agencies/ICC
Commerce Commission, Illinois
The ICC's mission is to balance the interests of consumers and utilities to ensure adequate, efficient, reliable, safe and least-cost public utility services.
https://www2.illinois.gov/agencies/DCEO
Commerce and Economic Opportunity, Department of
Our mission is to provide economic opportunities for businesses, entrepreneurs, and residents that improve the quality of life for all Illinoisans. We are laser-focused on improving transparency and accountability, enhancing customer service, increasing Illinois’ competitiveness, advancing minority empowerment, modernizing Illinois’ workforce, and elevating our state’s promotional efforts.

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