The Internal Revenue Service on Thursday announced a $100 tax increase on most American households earning more than $400,000 a year.
The new tax was proposed as part of an effort to address a growing problem that has emerged in the United States of people not paying federal income taxes.
The IRS says the change in federal income tax rules has forced millions of Americans to pay more in taxes than they otherwise would.
But the new tax will apply to many Americans who earn less than $100,000 annually, including some in Florida.
In its tax filing for the year ending in December, the IRS lists the total number of taxpayers who will see a tax increase.
But there are many more people whose income is under $400.
The new federal tax on people earning less than that amount would apply to individuals and married couples filing jointly, regardless of the tax filing status.
It would apply even if the two taxpayers own the same home.
The increase will apply retroactively to people who earned more than the threshold in the year they filed their federal income return.
The Associated Press contributed to this report.