There's still time to reduce your 2017 tax bill. You can make a tax-deferred individual retirement account contribution that can be applied to your 2017 tax return any time before April 17, 2018. Here's how to take advantage of this tax break for IRA participants. Max out your IRA. You can defer paying income tax on up to $5,500 that you contribute to an IRA. A worker in the 25 percent tax bracket who maxes out his IRA could reduce his tax bill by $1,375. But you don't need t