To ensure a reduced tax rate, you must complete a US tax form (W-8BEN/W8-BEN-E), also known as a “Certificate of Foreign Status of Beneficial Owner for the United States Tax Withholding”. The form’s purpose is to “certify” your country and confirm that you are not a resident of the United States. A W-8 series provided by a Non-US person will remain valid for a period starting on the date the form is signed and ending on the last day of the third succeeding calendar year unless a change in your circumstances makes any information on the form incorrect. For example, a Form W-8BEN signed on 30 September 2021 remains through 31 December 2024.