Snippet taken from a post in the seller forums on amazon
"Hi Folks,
We reached out to Seller Support, and were given the following response:
"Please know that Service Owners confirmed that sellers based in the US (US business location) are not required to complete the INFORM Act Tax Questionnaire.
They have identified a technical issue on their end which has resulted in the link being displayed to these sellers and they are working to remove it.
For which we thank you for ignoring the message that is coming to you."