I select "Use foreign address box". However, I cannot remove the content in US address. In the final review, system tells me that All US Address fields much be blank.

[AnthonyC]

If you entered a Foreign Address and at one time had a US address in your information and are finding the US address remaining in the background during error check - try these steps to resolve this issue - 

• Return to the My Info section and select the edit next to your mailing address
• Change the mailing address drop-down box from Foreign address back to US address
• You may see part of your US address still there (i.e City Name) - remove any US entries still present
• Change the drop-down box back to Foreign address from US address
• Reenter your current foreign address and continue to file your return