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Assuming that you do not qualify for any of the special exceptions, you would pay 35% if you well it after one year or less OR 15% if held more than one year.
If you owned and lived in it for at least 2 years, the first $250,000 (or $500,000 if married filing jointly) is completely tax exempt.
There are some exceptions that could get you a partial exemption even if you lived there less than two years. The primary ones are a sale due to change in employment location, a sale due to a health related move, and a sale due to a decline in financial ability to maintain the home.
If you own the house for more than one year, i.e. one year and one day, it will qualify for long term capital gains and your maximum tax will be 15% of the net gain.
Florida does not have an income tax so there is no additional tax for you. If you lived in, or if the property was located in, a state that has an income tax, you would need to consider that as well.