A tax identification number is a unique nine-digit number issued by the Social Security Administration or the IRS to anyone ...

An Individual Taxpayer Identification Number is a nine-digit number the IRS uses to process taxes and administer tax laws.

It is a TFN (Tax file number ) which is an important piece of personal identification which should not be lost and never revealed to anyone unless they are authorised to ask for it.

The traditional penalty for an individual who has not filed their taxes by the deadline is 5 percent of the tax due for each ...