To register a business in the United States, you will need to complete some paperwork and submit it to the proper authorities. The forms you will need to fill out and the instructions for doing so vary depending on what type of business you are starting and where it will be located.
You can find the forms and instructions for registering your business on the website of the Small Business Administration (SBA). The SBA is a federal government agency that provides assistance to small businesses.
If you are starting a sole proprietorship or partnership, you will need to register your business with your state government. You can find the forms and instructions for doing this on the website of your state's Secretary of State office.
If you are forming a corporation or limited liability company (LLC), you will need to file paperwork with both your state government and the federal government. You can find the forms and instructions for doing this on the websites of your state's Secretary of State office and the Internal Revenue Service (IRS).