ITIN RENEWAL.

The IRS reminds taxpayers with expiring Individual Taxpayer Identification Numbers (ITINs) to submit their renewal applications as soon as possible. Failing to renew them by the end of the year will cause refund and processing delays in 2018.

The IRS mailed more than 1 million letters to taxpayer households that include an ITIN holder with middle digits 70, 71, 72 or 80. Affected taxpayers who expect to file a tax return in 2018 should submit a renewal application now.

Those who must renew...