Form 6166 – Certification of U.S. Tax Residency

Information on Form 6166 – Certification of U.S. Tax Residency

Many U.S. treaty partners require the IRS to certify that the person claiming treaty benefits is a resident of the United States for federal tax purposes. The IRS provides this residency certification on Form 6166, a letter of U.S. residency certification.

Form 6166 is a letter printed on U.S. Department of Treasury stationery certifying that the individuals or entities listed are residents of the United States for purposes of the income tax laws of the United States. You may use this form to claim income tax treaty benefits and certain other tax benefits in foreign countries.

Form 6166 – Value Added Tax

Form 6166 may also be used as a proof of U.S. tax residency status for purposes of obtaining an exemption from a VAT imposed by a foreign country. In connection with a VAT request the United States can certify only to certain matters in relation to your U.S. federal income tax status, and not that you meet any other requirements for a VAT exemption in a foreign country.