All LLCs are required to list a Registered Agent when they file and when they update their documents annually. However, it is not required that the Registered Agent be a different entity or person than the business owner. This means that you can act as your own Registered Agent. For small businesses or those with just a single owner, this may be simple enough. But if you have any ongoing correspondence with your state or the IRS, it can be a good idea to delegate this role to a service like ZenBusiness.