3Once we have your Win Slip, US Tax Recovery will submit an application, on your behalf, to the IRS. The application is submitted in order to obtain an IRS Individual Taxpayer Identification Number (ITIN). This process takes between 6 and 10 weeks. If you have already been issued an ITIN, US Tax Recovery will immediately proceed to Step 4, avoiding the 6 to 10 weeks processing time. Once you have been assigned an ITIN, it is yours to keep and reference for years to come, expediting the recovery of your gambling winnings tax in the future.