IRS address for international expatriates (expats)

It's tax season! It's pretty simple to file online if you live in the United States, but if you live abroad, you have to print your tax forms and mail it to this following address:

Regular postmail
Internal Revenue Service Center
Austin, Texas 73301-0215
U.S.A.

Courier mail like DHL/FedEx
Internal Revenue Service
3651 South Interregional Hwy 35
Austin, Texas 78741
U.S.A.
Telephone: +1 (512) 460 7944
Toll-free: +1-800-829-1040

Source: U.S. Embassy, London.