Tax Implications of Changing State Residency

[Collin Argue]

I will be relocating to Florida later this year as part of my active duty military service. I am currently a Wisconsin resident, but I plan on becoming a legal resident of Florida to avoid paying income tax in the future. With regards to filing taxes for the 2021 fiscal year, can I still claim Florida residency if I only reside there for 4 or 5 months of 2021? What are the immediate tax implications of my residency change? Would it behoove me to arrive in Florida earlier and live their for 6 or more months of 2021?