This GET endpoint is used to get a W8/W9 tax interview link for a specific user identified by their user_token. The user should be directed to link that is obtained by this endpoint.
To use this endpoint, replace user_token in the URL path with the actual user token of the user whose tax information you want to collect.
The user's stored address is pre-filled on the hosted form. Store the user's country of residence (not citizenship): a non-US country pre-fills a foreign address, which the hosted W-9 accepts (U.S. citizens living abroad file a W-9 with their foreign address). A US address is only pre-filled when its state and ZIP code are valid US values; otherwise the user enters the address on the form. The hosted form also lets the user upload an already completed W-9.