It normally takes the IRS 4-6 weeks to review and process your ITIN Application. All inquiries on the status of an application submitted by you or more than 6 weeks ago can be made by calling 1-800-829-1040 (Within the US) or 215-516-2000 (Overseas Only) or by faxing 215-516-3270 or 215-516-1171.Please have a copy of your Form W-7 Application on hand when inquiring status application. If however you receive a subsequent notice or have a problem (other than wanting a general status report) on a W-7 Application then there are two telephone lines designated for your inquiries 215-516-4173 or 215-516-3301.