The Internal Revenue Service has issued proposed regulations to create a new taxpayer identifying number known as the IRS Truncated Taxpayer Identification Number, or TTIN, that can be used instead of a Social Security number in response to the growing problem of identity theft-related tax fraud.

The TTIN would provide an alternative to using a Social Security number (SSN), Individual Taxpayer Identification Number (ITIN), or IRS Adoption Taxpayer Identification Number (ATIN). The filer of certain information returns would be able to use a TTIN on the corresponding payee statements to identify the individual being furnished a statement. The TTIN would display only the last four digits of an individual’s identifying number and is shown in the format XXX-XX-1234 or ***-**-1234.

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