Possibility 1: If an appropriate treaty has not been claimed while taking the tax interview
 
Possibility 2: If while taking the tax interview you indicated that you provide your services both inside and outside the United States. For this to apply, you have to be physically present inside the United States for part of the time you are doing business with the Amazon Associates program. If this is the case, we need to know the percentage of time you will be spending inside the United States conducting business with the Amazon Associates program.
 
Being a member of the Amazon Associates US program does not mean that you supply your services both inside and outside the United States. IE, if you are an Associate in the UK, posting links to a US based site, does not constitute US sourced income.
 
If you believe you chose this selection in error, please retake the tax information interview.
 
Directions to retake the interview:

• Go to: https://affiliate-program.amazon.com/
• Log in to your account with your email address and password
• At the top right of the screen, click on “Account Settings”
• Click on “Change your Tax Information” in the “Payment and Tax Information” section