Certification of U.S. tax residency
Form 6166 is a computer-generated letter that certifies U.S. tax residency and unlocks reduced foreign withholding on dividends. It is valid only for the specific calendar year printed on the certificate, so a new one is needed for each year you claim.
- Issued by
- IRS
- Valid for
- One calendar year
- How to apply
- Apply on Form 8802