Your business' legal name is the name that you use on the paperwork you file to create your business. If you own a corporation, it is the name on the corporation papers you file with your state, including the articles of incorporation. If it is an LLC, it is the name on the LLC formation papers you file with the state. By filing those papers, you officially designate the legal name of your business. This is also the name that appears on your tax ID or employee ID paperwork and is the name used on your tax returns.The legal name is the formal, official name of your business that identifies it with the government. If you have a corporation, your name probably contains the designation âInc.," such as Cute Boots Inc. If your business is an LLC, your name likely concludes with âLLC," like Valley Woodwork LLC.