Я заполнил в соответствии с инструкцией
Line 6. If you are providing this Form W-8BEN to
document yourself with respect to a financial account that
you hold at a U.S. office of a financial institution, provide
the tax identifying number (TIN) issued to you by your
jurisdiction of tax residence unless:
You have not been issued a TIN, or
The jurisdiction does not issue TINs.
If you have not provided your jurisdiction of residence
TIN on line 6, provide your date of birth in line 8.
Если вы не можете заполнить свой номер, то заполните дату рождения в графе 8. Заполнил и всё прошло.