TaxCenter на Shutterstock

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Добрый день форумчане . Возможно этот вопрос уже обсуждался - но мне пришло такое письмо :
U.S. law requires all foreign royalty recipients who are not residents or citizens of the United States to complete and submit appropriate tax forms to Shutterstock. Shutterstock has provided these forms and detailed instructions for you in our Tax Center.

Note that the U.S. has reduced tax treaties with many countries. If you are a resident of a treaty country and you do not submit a properly completed Form W-8, then 30% of your U.S. source earnings will be withheld.

To determine whether your country has a tax treaty with the U.S., please review the Tax Treaty Country List.

Again, for details and instructions, please visit our Tax Center.

Please do not hesitate to contact us at taxhelp@shutterstock.com if you have any questions.

Форму W-8 я уже заполняла и отправляла . Для чего нужно все это повторно делать? Может кто подскажет ...плииз