The IRS can deny business deductions if it determines an activity is a hobby rather than a business. Learn how taxpayers won and lost real Tax Court cases, what records impressed the court, and the mistakes that destroyed otherwise valid deductions under IRC Section 183.

The One Big Beautiful Bill Act preserved many TCJA benefits, but charitable deduction limits will still tighten in 2026. Accelerating contributions this year can capture higher deduction value while the 60 percent AGI rule remains in effect.

The Tax Cuts and Jobs Act (TCJA) of 2017 brought sweeping tax changes—but many of them are temporary. If Congress does not act to extend key provisions, most individual tax cuts will expire on December 31, 2025, and revert to 2017 law starting in 2026.

Here’s what’s changing—and who’s most at risk of paying more.