A Declaration of Domicile is a legal document that identifies your principal home in Florida, with tax and asset protection benefits. Your domicile is the state of your permanent home, or the state you consider your home whenever you are elsewhere.Your domicile is an important place. Your domicile is the state that you intend to make your permanent and primary home. There are significant benefits to establishing a domicile in Florida. In Florida, it is important to determine a person's domicile. Domicile determines which state can probate a will. Have you ever heard of a "Declaration of Domicile? " A Declaration of Domicile is a legal document that helps establish Florida residency. Domicile refers to the place you call home permanently.