Thursday, Feb 09th
Last update11:38:52 PM GMT
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 December 2011.
FORM W-9 (12-11) (84.44 kB) Download
INSTRUCTIONS FOR REQUESTER OF FORM W-9 (01-11) (145.56 kB) Download