The type of business entity you choose will depend on three primary factors: liability, taxation, and record-keeping. Before you establish a business, you may consider consulting with a Corporate/Business Law Attorney or Certified Public Accountant (CPA), who specializes in your industry, for advice about what type of business entity will meet your business needs and what your legal obligations will be. Show
You must register your business entity with the proper government agency, once the most appropriate business entity is determined :
Accordingly, you, or your licensed representative, must also register for your business taxes with the U.S. Internal Revenue Service (IRS) and Illinois Department of Revenue (IDOR). The City of Chicago business tax registration is part of the business license application process. For additional information about business and tax registration, please review the chart below: Accordingly, you, or your licensed representative, must also register for your business taxes with the U.S. Internal Revenue Service (IRS) and Illinois Department of Revenue (IDOR). The City of Chicago business tax registration is part of the business license application process. For additional information about business and tax registration, please review the chart below:
Search the Illinois corporation registryFollow this direct link to the official Illinois Secretary of State corporation search page.Perform a multi-state searchFind out if a company registered in Illinois is also registered in other states. National Corporation Directory Multi-State Search(nationwide search of all 50 official Secretary of State databases, $25 fee for unlimited searches for one day) Find more info on an Illinois companyUse public corporation web search tools. Free Nationwide Business Search(free commercial database of 28 million U.S. business locations with addresses and phone numbers) • By Company Name • • By Person Name • • By Phone Number • How do I get my Illinois Secretary of State identification number?The Illinois Department of Revenue accepts applications by mail or online. When applying online, go through the Illinois Business Gateway website or Form REG-1 if filing by mail. Complete the Illinois Business Registration Application and provide the company's FEIN, business name, primary and mailing business address.
How do I look up a business name in Illinois?How do I check to see if a Corporation/LLC name is available? The Illinois Secretary of State Department of Business Services provides a database at http://www.ilsos.gov/corporatellc/ where you can do a preliminary search. LLC's - 217-524-8008.
How do I look up an LLC in Illinois?Visit the Illinois Secretary of State's website
The Illinois Secretary of State's Office has a Department of Business Services database where you can search the business names of corporations and limited liability companies.
How do I check the status of my business in Illinois?How can I check the status of my corporate annual report and/or change my registered agent? For information on corporate annual reports and changing your registered agent, contact the Illinois Secretary of State at 1 217 782-6961 or visit their website at https://www.ilsos.gov.
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