license under TX state or local rules and, if not, why not? Are you required to register for income or sales and use tax purposes as a retail vendor?...

Must you have an occupational license under TX state or local rules and, if not, why not? Are you required to register for income or sales and use tax purposes as a retail vendor? Assume you are required to register and report sales with TX state and/or local tax jurisdiction does it make any difference if the items sold are old household items?