Trump sues IRS for $10bn over alleged tax return leak, targets U.S. Department of the Treasury as well

On January 29-30, 2026, U.S. President Donald Trump sues IRS, a lawsuit seeking $10 billion against the Internal Revenue Service (IRS) and the U.S. Department of the Treasury over what his legal team calls a massive tax return leak. The complaint says a former IRS contractor secretly shared Trump’s private tax records with media outlets in 2019-2020, and that the agencies failed to stop it.