Millions of Americans who file their own returns have long learned about tax math mistakes only after the Internal Revenue Service quietly changed their refund or balance due. A new federal law ...

Questions over Senate support for President Donald Trump’s tax overhaul took center stage as lawmakers weighed the bill’s costs and political risks. The debate turned on whether a handful of ...

Got questions about the new deductions for tips, overtime, seniors and car loans? Here’s what you’ve been asking—along with my answers—about those, as well as other updated tax provisions. The One Big ...