Here Are The Permits, Tax ID Number(s) & Other Registrations Required When Starting a Business All Businesses need a Business Permit & an Fictitious Business Name. If you are a retailer or wholesaler, you will need minimum a Sellers Permit , & a Business Permit . If you hire workers, you will need minimum a Federal Tax Id Number (EIN) & State Employer Permit , & a Business Permit . Corporations and LLC s need minimum a Federal Tax Id Number (EIN) & a Business Permit . Partners need minimum a Federal Tax Id Number (EIN) a Fictitious Business Name & a Business Permit . Sole Owner/Proprietors may get and use a Federal Tax Id Number (EIN) as a Business Permit ID Number & also minimum need a Business Permit .Instead of filing an Fictitious Business Name , you can choose Incorporation or form an LLC & You will not need an Fictitious Business Name