I also had an LLC when I was in Chicago and I agree with the above statements. You do need a business license in Chicago, but not necessary if you are operating under your legal name. I was fortunate enough to have a great lawyer who helped us with all of the legal aspects of owning a business.
I run a small business in Hawaii where I travel to clients homes to train them through yoga, pilates, and personal training. When I decided to open my business I went to the Business Action Center. They helped me with all the paperwork I needed. I filed a LLC, General Excise Tax ID number, and a Federal ID number with the IRS. You can find out a lot about your states requirements online, although it was very helpful for me to go into an office and work with someone who knew exactly what I needed and how to complete the forms correctly. The Business Action Center’s services were free. They also had a attorney come in once a week that was available to answer any legal questions I might have had. The process can seem overwhelming at first, but it is a great learning experience of everything that goes into building a business from the ground up. Wish you the best.
In good health,
I operate a mobile wellness firm within the DC, Maryland, VA Tri-State area using only my registered business name and DBA (Doing Business As) names – registered to my headquarters (my home). In most states you do need to be a registered business and have Liability insurance for your company, equipment and employees. As everyone has already mentioned though the requirements are different for every locale.