NC: Within 60 days of establishing a permanent residence in North Carolina, new residents who plan to operate a motor vehicle must get a North Carolina driver license and title and register their vehicles with the N.C. Division of Motor Vehicles.
https://www.ncdot.gov/dmv/help/moving/Pages/new-residents.as...
GA: If you own or lease a vehicle in Georgia, you must register it with the state. [...] New residents should register their vehicle no more than 30 days from the date they move to Georgia.
https://georgia.gov/register-vehicle
FL: When you move to Florida and become a resident you have 10 days to register your out of state vehicle.
https://www.dmvflorida.org/vehicles/out-of-state-car-registr...
CA: Once you officially establish residency in California, you will have 20 days to register your vehicle with the DMV to avoid late fees.