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The Daily Insight

How long can you claim a dependent on your tax return?

Author

Ava Robinson

Published Mar 04, 2026

You can claim dependent children until they turn 19, unless they go to college, in which case they can be claimed until they turn 24. If your child is 24 years or older, they can still be claimed as a “qualifying relative” if they meet the qualifying relative test or they are permanently and totally disabled.

What if I was claimed as a dependent?

If your dependent is claimed on your tax return, they may still be required to file an income tax return of their own. Please be aware that you should NOT include your dependent’s income as income on your own tax return. Your dependent has to report their income on their own tax return.

How can I claim my child as a dependent on my tax return?

If you already filed your return, you may need to submit Form 2120 via postal mail to the IRS. For situations where the same child may be eligible to be claimed as a dependent or qualifying child by more than one person, the IRS will apply a set of tiebreaker rules to determine who has the right to claim the dependent.

How does the IRS handle tax returns claiming the same dependent?

File IRS Form 2120, the Multiple Support Declaration, to allow one taxpayer to claim a dependent who’s supported by more than one person. How the IRS Handles Dependent Audits The IRS will first attempt to determine which taxpayer isn’t entitled to claim the dependent. It will send an audit notice to that individual.

Can a noncustodial parent claim a child as a dependent?

However, if you are a noncustodial parent claiming the child as a dependent, you have two options:

How old do you have to be to file a dependent tax return?

Must be related to you by blood, or be your adopted child, stepchild, or foster child placed with you by an agency. Descendants of these individuals qualify as well. Must be younger than age 19 on the last day of the tax year, or age 24 if a full-time student. Exceptions to the age rule exist if the child is totally and permanently disabled.