This is just an opinion, and we all know what opinions are like. 🙂
Because NY and CA are tax hells, I would suggest you totally and completely close any and all businesses registered in those states, in their entirety. For NY this will involve filing a notice of dissolution of some type.
Then after you move to FL establish a completely new business registered as an LLC in the state of FL with a completely new EIN. Since it's absolutely free and only takes about 10 minutes to get an EIN at https://www.irs.gov/businesses/small-businesses-self-employed/apply-for-an-employer-identification-n... this should not be that big of an issue.
