For Florida, if your business "maintains" a physical presence in the state, it needs to be registered with the Florida Division of Corporations at https://dos.myflorida.com/sunbiz/
You'll pay a "registration tax" every year, when you renew the registration. If you don't maintain a presence in the state, then nothing to do. Otherwise, be aware that the late filing fees are $$$HIGH$$$ if you miss the filing deadline any year. For LLCs and corporations the deadline is May 1st each year. you'll pay the late filing fee if registered after May 1st and before Sept 30th. After Sept, the business is administratively dissolved by the state, and reinstatement costs are exorbitant.
