Form 2120

Multiple Support Declaration

Understanding tax forms is crucial for accurate and compliant tax filings. The 2120 form is one of these essential documents. This comprehensive guide provides detailed insights into everything you need to know about the 2120 form, offering clarity and guidance for taxpayers.

What is a 2120 Form?

The 2120 form, or "Multiple Support Declaration," is a tax document used by individuals who collectively provide over half of a person's financial support but no single contributor provides more than half. This form allows multiple people to agree on who among them claims the dependent for tax purposes in a specific tax year, facilitating tax benefits such as exemptions and credits for supporting dependents.

Purpose and Significance

  • Allows shared tax benefits: Facilitates tax deductions among supporters.
  • Legal compliance: Ensures accurate tax filings in shared support situations.

Components of the Form

  • Declaration of multiple supporters.
  • Details of the supported person.
  • Allocation of claim entitlement.

Who Needs a 2120 Form?


  • Two or more people together provide more than half of a person’s support.
  • Each contributor could claim the dependent based on financial support but individually does not meet the more than half requirement.


  • Determine who will claim the exemption.
  • Ensure all contributors agree and sign the 2120 form.


  • Generally, by the tax filing deadline (April 15).

How to Read and Understand 2120 Form

This section breaks down each portion of the form, including:

  • Identifying the contributors.
  • Documenting the support provided.
  • Designating the tax year and dependent in question.

How to Get Your 2120 Form


Common Mistakes and How to Avoid Them

Common errors:

  • Incorrectly allocated support percentages.
  • Failure to obtain agreement from all contributors.


  • Double-check calculations.
  • Communicate clearly with other contributors.

2120 Form and Tax Filing

Impact on tax filing:

  • Can affect eligibility for certain tax credits and deductions.

Role in tax returns:

  • Required documentation for claiming a dependent under multiple support agreements.

FAQ Section

  1. Can the same person claim the dependent every year using a 2120 form?

    • Not necessarily; it depends on the agreement among the supporters each year.
  2. What if someone contributes but doesn’t sign the form?

    • Their support cannot be counted towards the more than half requirement.
  3. How does the IRS verify the information on the 2120 form?

    • Through documentation and audits if necessary.
  4. Can non-family members use the 2120 form?

    • Yes, as long as they meet the support criteria.
  5. What happens if no agreement is reached?

    • No one can claim the dependent until the issue is resolved.


The 2120 form is integral for taxpayers supporting a dependent collectively. Understanding and properly utilizing this form could result in significant tax benefits. However, due to the complexity and necessity for accurate information, consulting a tax professional is highly recommended for unique or complicated situations.

Remember, accurate and compliant tax filings are not only a legal obligation but also a step towards maximizing your potential tax benefits.

Always refer to the IRS website or a tax professional for the most accurate and up-to-date information. provides general information and software tools for tax preparation; however, it does not offer personalized tax, legal, or professional advice. It's recommended to consult with a qualified professional for specific advice related to your financial situation.