To obtain an ITIN number, individuals need to complete the Form W-7. The form is also known as the ‘application for IRS Individual Taxpayer Identification’ and is used to apply for an ITIN. The ITIN number is a nine-digit number issued to individuals including non-residents, resident aliens, dependents and spouses of US citizens or resident aliens, seeking to file a tax return but do not qualify for the social security number.
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