Publication 54
taxmap/pubs/p54-009.htm#en_us_publink100047396The United States may reach agreements with foreign countries
to eliminate dual coverage and dual contributions (taxes) to social security
systems for the same work. See
Bilateral Social Security (Totalization) Agreements
in chapter 2 under
Social Security and Medicare Taxes.
As a general rule, self-employed persons who are subject to
dual taxation will only be covered by the social security system of the country
where they reside. For more information on how any specific agreement affects
self-employed persons, contact the United States Social Security Administration,
as discussed under
Bilateral Social Security (Totalization) Agreements
in chapter 2.
If your self-employment earnings should be exempt from foreign
social security tax and subject only to U.S. self-employment tax, you should
request a certificate of coverage from the U.S. Social Security Administration,
Office of International Programs. The certificate will establish your exemption
from the foreign social security tax.
Send the request to the:
Social Security Administration
Office of International Programs
P.O. Box 17741
Baltimore, MD 21235-7741