An official website of the United States government

Internal Revenue Service (U.S. Taxes)
August 4, 2023

Important Notice

The U.S. Embassy would like to remind U.S. citizens that they are required to file their federal income taxes with the Internal Revenue Service (IRS) by April 18, 2022.  If you are a U.S. citizen or resident alien living or traveling outside the United States, you generally are required to file income tax returns, estate tax returns, and gift tax returns, and pay estimated tax in the same way as those residing in the United States.  Your worldwide income is subject to U.S. income tax, regardless of where you reside.

There is no Internal Revenue Service (IRS) office at the U.S. Embassy and Consulate in Vietnam. The ACS staff is unable to answer inquiries about the preparation and filing of U.S. taxes.


International Taxpayer Services

If you are a taxpayer who lives outside the United States and have specific individual or business account questions, you may contact the International Taxpayer Service Call Center by phone or fax.

The call center is operational Monday through Friday, from 6:00 AM to 11:00 PM, Eastern Time:

  • Tel: 001-267-941-1000 (not toll free) ; select the option for international callers
  • Fax: 001-267-941-1055 (a response should be received within 10 to 12 working days)


Individual taxpayers located outside the U.S. may also contact the IRS by mail at:

Internal Revenue Service
International Accounts
Philadelphia, PA 19255-0725


Business taxpayers located outside the U.S. may also contact the IRS by mail at:

Internal Revenue Service
International Accounts
Ogden, UT 84201-0038

The State Department reminds all U.S. Citizens and Legal Permanent Resident Aliens that you are responsible for filing U.S. federal income tax returns while living overseas.


Publications & Forms

Click these links from the IRS for comprehensive guidance and downloadable forms for International Tax Payers:


More useful links:


Need someone to prepare your tax return?

The IRS maintains a directory of Federal Tax Return Preparers with Credentials and Select Qualifications located worldwide.

Contact Us

Please note that we will not respond to inquiries sent by postal mail or fax.

Submit an inquiry: Inquiry Form

U.S. Embassy in Hanoi
Consular Section,
Rose Garden Building
Second Floor, 170 Ngoc Khanh Street
Hanoi, Vietnam
Mailing Address:
Consular Section
U.S. Embassy in Hanoi
7 Lang Ha Street, Hanoi, Vietnam

U.S. Consulate General in HCMC
American Citizen Services
4 Le Duan Blvd., Dist. 1
Ho Chi Minh City, Vietnam