From a legal business entity standpoint, one does not normally have to file any forms with the state the business is located in to be considered a sole proprietor (SP). However, this highly unadvisable since a SP provides no liability protection.The most popular, and most advisable business entities are a Limited Liability Company (LLC) and a Corporation. These entities are state created entities meaning that you must file the necessary paperwork in the state where you will have the business headquarters. The stateu2019s secretary of stateu2019s office will have all the necessary documents, forms, and rules needed to create the entity of your choice. You will also have to pay a filing fee.It is important that you further discuss the issue with experienced counsel as they will be able to help you decide which entity is best for you, and help you with the filing.