How do I file with a W-7?
Then, complete your return as you normally would, except leave the applicant's Social Security number blank (ignore any warnings about the empty SSN field).
When your return is finished and you're ready to file, select the File by Mail option as you won't be able to e-file. After printing the filing copy of your return, sign it and write Applied For wherever the Social Security number is missing.
Bring your printed, signed return (along with any attachments per the filing instructions, such as W-2s or 1099s), the completed W-7, proof of identity, and foreign status documents to your acceptance agent or an IRS Taxpayer Assistance Center. You can also mail everything to:
Internal Revenue Service
Austin Service Center
P.O. Box 149342
Austin, TX 78714-9342
See also General ITIN Information at IRS.gov.