How do I claim a tax treaty benefit on my U.S. return, and do I need a special form?

To claim a treaty position that reduces or eliminates U.S. tax on a specific item of income, you generally attach Form 8833, the Treaty-Based Return Position Disclosure, to your Form 1040 or 1040NR. This form identifies the treaty, the article you are relying on, and the income affected. Some routine treaty benefits, like reduced withholding on dividends claimed through a Form W-8BEN given to your broker, do not require Form 8833. But taking a position that overrides normal U.S. tax rules usually does, and failing to file it when required carries its own penalty. Not every situation qualifies, and residency tie-breaker claims are among the trickiest. Read the specific treaty text and the Form 8833 instructions on irs.gov, and get advice for anything beyond a standard withholding reduction.