The difference between a single member sole prop and a single member LLC is simply the spelling ... both are treated exactly the same way on an income tax return. Adding the LLC may require you to register with the state and pay an annual fee so there is no reason to do so unless you want to or need to. A good liability policy would be more helpful then adding LLC to your business name. Read up on all your options before you do anything ... https://www.irs.gov/businesses
