Social Security Number

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IRS.gov Website

Social Security Number

SSN


Forms and Instructions

Relevant Forms

Form W-9S Request for Student's or Borrower's Taxpayer Identification Number and Certification

Form 8945 PTIN Supplemental Application For U.S. Citizens Without a Social Security Number Due To Conscientious Religious Objection

Form 8946 PTIN Supplemental Application For Foreign Persons Without a Social Security Number


Publications

Links Inside Publications

Publication 15 - Circular E, Employer's Tax Guide - 4. Employee's Social Security Number (SSN)

4. Employee's Social Security Number (SSN). You are required to get each employee's name and SSN and to enter...

Publication 17 - Your Federal Income Tax (For Individuals) - How Do I Prepare My Return?

Social Security Number (SSN). You must enter your SSN on your return. If you are married, enter the SSNs for...

Publication 17 - Your Federal Income Tax (For Individuals) - Interest Income

Social security number (SSN). You must give your name and SSN to any person required by federal tax law to...

Publication 17 - Your Federal Income Tax (For Individuals) - Dividends and Other Distributions

Social security number (SSN). You must give your name and SSN (or individual taxpayer identification number...

Publication 17 - Your Federal Income Tax (For Individuals) - Part B. Rules If You Have a Qualifying Child

Social security number. The qualifying child must have a valid social security number (SSN) unless the child...

Publication 54 - Tax Guide for U.S. Citizens and Resident Aliens Abroad - Nonresident Alien Spouse Treated as a Resident

Social Security Number (SSN). If you choose to treat your nonresident alien spouse as a U.S. resident, your...

Publication 80 - Circular SS - Federal Tax Guide for Employers in the U.S. Virgin Islands, Guam, American Samoa, and the Commonwealth of the Northern Mariana Islands - 3. Employee's Social Security Number (SSN)

3. Employee's Social Security Number (SSN). An employee's social security number (SSN) consists of nine digits...

Frequently Asked Questions

FAQ - IRS Procedures

What can I do if I think someone has filed a tax return using my social security number? The IRS has security...

FAQ - Filing Requirements, Status, Dependents, Exemptions

I am adopting a child and do not yet have a social security number for the child. How can I claim an exemption...

FAQ - Filing Requirements, Status, Dependents, Exemptions

My daughter was born at the end of the year. We are still waiting for a social security number. Can I send...

FAQ - Child Care Credit, Other Credits

My babysitter refused to provide me with her social security number. Can I still claim the amount I paid to...

FAQ - Child Care Credit, Other Credits

Can I claim the child tax credit for a child who has an ITIN, rather than a social security number? Yes, you...

FAQ - U.S. Aliens and Citizens Living Abroad

I live in a foreign country. How do I get a social security number for my dependent who qualifies for a social...

FAQ - U.S. Aliens and Citizens Living Abroad

My spouse is a nonresident alien. How can I get a social security number for her? If you are a U.S. citizen...

Tax Topics

Tax Topic 857

Individual Taxpayer Identification Number (ITIN) – Form W-7. A taxpayer identification number must be furnished...