A QI must use Form W-9 for its US clients, including a US resident alien. A Form W-9 bearing a valid US tax number (ITIN, SSN, EIN) is valid indefinitely.
The latest Form W-9 was published by the IRS in October 2018.
Form W-9
A QI must use Form W-9 for its US clients, including a US resident alien. A Form W-9 bearing a valid US tax number (ITIN, SSN, EIN) is valid indefinitely.
The latest Form W-9 was published by the IRS in October 2018.