Money ‘Pay what you owe’: Your taxes are due if you filed for a federal tax extension October 15, 2019October 15, 2019Aimee Picchi, Special to USA TODAYComments Off on ‘Pay what you owe’: Your taxes are due if you filed for a federal tax extension Millions of taxpayers asked the IRS for an extension on filing federal taxes in April. The deadline to file is today.