Snowbirds will have to take pains to prove Florida is their primary residence for more than half the year. iStock By Sandra Block, Senior Editor From Kiplinger's Personal Finance, July 2017 QI live in New York. If I buy a second home in Florida, can I count Florida as my residence for state tax purposes?AMaybe, and claiming the Sunshine State as your permanent residence could save you a lot of money. Florida has no state income tax, whereas New York has a top income tax rate of 8.92%. But you can’t just tap your heels together to make it happen. And tax officials in states that are home to a lot of snowbirds—New York and Minnesota in particular—have become more aggressive about going after people they consider taxpaying residents. SEE ALSO: Most Tax-Friendly States for Retirees State laws vary, but in general, you need to be able to prove that you intend to make the low-tax state your permanent home, says Rocky Mengle, a senior analyst for Wolters Kluwer Tax & Accounting. The easiest way to do that is to sell your place up north and move down south. Of course, for many retirees, it’s not that simple. You may want to keep the northern home in your family or return there during the summer months. If that’s your plan, be prepared to keep meticulous records that will demonstrate your devotion to your new state. Prove it. First, you’ll need to show that you spend more than half the year—183 days—in the state you claim as your domicile (that is, the place you consider your permanent home). That’s the basis for most state definitions of residency for tax purposes. But don’t expect state tax auditors to take your word for it. Keep a diary or log showing the number of days you spend in each state during the year, says Tim Steffen, director of financial planning for Robert W. Baird. In the past, snowbirds could use plane tickets to show they were gone more than six months, but that may no longer suffice, says Terry LaBant, senior wealth strategist for Calamos Wealth Management in Naperville, Ill. State tax auditors may claim that such tickets only show where you were the day you left New York for Florida and the day you returned, but not all of the days in between, he says. Advertisement Next, take steps to show that you’re committed to your new state. Register to vote and, if you receive a jury summons, perform your civic duty. Apply for a library card, and change your driver’s license and car registration. You’ll strengthen your case if you hook up with health care providers in your new location. Open an account at a local bank, and keep receipts of ATM withdrawals, LaBant says. Shopping locally is also a good idea: State tax auditors sometimes review credit card records to determine where you were during the year. One of LaBant’s clients, who had homes in New Jersey and Florida, was questioned by New Jersey tax auditors about purchases his wife made from a retailer in New Jersey. Fortunately, the client was able to produce records that showed the items had been ordered and shipped to the couple’s Florida home. SEE ALSO: Least Tax-Friendly States for Reitrees In some cases, your adopted state will help you prove residency. You can show your intent to live in Florida, for example, by filing a Declaration of Domicile with your local county court. As you take steps to establish residency in a new state, you should also start to cut ties with the old one. Avoid taking advantage of benefits that are limited to state residents. For example, if you claim a homestead exemption for property taxes on your first home, state tax officials could use that to show that you’re still a resident and thus owe state taxes. Even checking the “resident” box on a state fishing license could be used as proof that you didn’t really intend to leave your northern home for good.