Form 6166 is from the U.S. Department of Treasury used as proof to foreign governments that U.S. residents are eligible to receive tax...

1. What is IRS Form 6166? Many U.S. treaty partners require the IRS to certify that the person claiming treaty benefits is a resident of...

What is Form 6166 - Certification of U.S. Tax Residency? Many U.S. treaty partners require U.S. citizens and U.S. residents to provide a...