The below notice regarding the IRS has been posted to the DOR website.
Expiring Individual Income Tax Identification Numbers (ITINs)
All ITINs not used on a federal income tax return in the last three years or ITINs issued before 2013 with the middle digits of 70, 71, 72 or 80 (9XX-70-XXXX) will expire on December 31, 2017. ITINs are issued to taxpayers who do not qualify for a Social Security number. To renew an ITIN before January 1, 2018, you must submit a W-7 application form with the IRS. For more information, visit the IRS website.*
*All information obtained in this email is from the Indiana Department of Revenue. For further information, please visit the links within the above text.