Many people choose to make Florida their state of residency because of our beneficial tax code. Unless you have fully relocated to the state permanently, it’s important to take steps to prove that you truly are a resident of Florida.
Generally, a state can only tax its non-residents on income from or assets located in that state. When you are no longer a resident of a state, and if you will no longer have income from or assets in that former state, it loses its ability to tax you. Thus, to prevent the loss of revenue from your departure, the former state may attempt to treat you as a resident, unless you prove otherwise.
Unless you take the appropriate steps to establish yourself as a Florida resident, your former state may still claim you on their tax rolls. In effect, you would counteract any benefits you saw in making Florida your state of residence.