If your business is an LLC, corporation, partnership, or nonprofit corporation, you'll probably need to register with any state where you conduct business activities.
Typically, you’re considered to be conducting business activities in a state when:
- Your business has a physical presence in the state
- You often have in-person meetings with clients in the state
- A significant portion of your company’s revenue comes from the state
- Any of your employees work in the state
Some states allow you to register online, and some states make you file paper documents in person or through the mail.