Individual Taxpayer Identification Numbers (ITIN) must now be renewed.

Prof. Francine J. Lipman, Sept. 24, 2016 - "Among the many amazing opportunities I have had as a law professor at the University of Nevada, Las Vegas is continuing my work with immigrants on their tax issues. As I have written about at length unauthorized immigrants pay many tens of billions of dollars a year in taxes including federal (about 4.4 million ITIN tax returns were filed in 2015 paying over $23 billion including $18.1 in federal income taxes and $5.5 in self-employment taxes), state, and local income, property, sales, excise, etc. ($12 billion annually), and payroll taxes (about $12 billion a year in net Social Security and Medicare taxes for which they currently receive no current or future benefit). ...

Nevertheless, Congress continues to challenge this population with respect to their tax compliance. If you do not know what an ITIN is then this issue likely does not directly effect you … however if you want a quick education the National Immigration Law Center (NILC) has a great primer available in English and Spanish here. Since 1996, IRS has issued about 21 million ITINs although only about 5 million are currently being used. Congress had previously enacted legislation causing any ITIN not used for five years to expire. However, that legislation was not given a chance to be enforced, because Congress has been busy enacting more recent ITIN expiration legislation that supersedes the five year law.

In the recently enacted PATH Act of 2015 (Protecting Americans from Tax Hikes), among other matters, all ITINs issued before 2013 will be expiring and have to be renewed. ... Until ITINs are renewed, returns with expired ITINs will be processed and treated as timely filed, but the returns will be processed without any exemptions and/or credits claimed and no refund will be paid. The taxpayer will receive a notice from the IRS explaining the delay in any refund and that ITINs must be renewed. Once ITINs are renewed, any exemptions and credits will be processed and any allowed refunds will be paid. If ITINs are not renewed, taxpayers may be subject to interest and penalties for any tax owed as a result of disallowed exemptions and credits. ... The more than 130 Low-Income Taxpayer Clinics across the country should be able to answer questions and point you in the right direction to get assistance. To find the contact information for a LITC in your area look at this user-friendly map and list in English and Spanish here.  Moreover, the NILC and other immigrant advocate groups and pro bono lawyers like myself are always here to lend a hand. On November 16th, UNLV will be hosting a Continuing Legal Education program titled “Everything You Need to Know About the NEW Taxpayer Identification Number (ITIN) Renewal Process” from 12:30 – 2:30 p.m.at William S. Boyd School of Law, Moot Court Room. Join us."