Family
Who should claim the child?
A $6,000 summer job, a teenager trying to do the right thing, one checkbox left blank, and the parents’ return rejected by the IRS. It happens to families every spring. Here is what the box means, what the mistake costs, how it gets put right, and the two situations where the question is a real one.
A son or daughter worked over the summer, earned about $6,000, and got a W-2 in January. Being responsible, they sat down with a free tax program, filed their own return, and collected a refund from the IRS and from Colorado. They were proud of themselves, and they should have been. Then the parents went to file their return in March, claimed the child as they always had, and the e-file came back rejected: a dependent on this return has already been claimed on another return.
What happened
Nobody did anything wrong on purpose. The tax program asked one question the teenager did not understand, “Can someone claim you as a dependent?”, and they answered no, because nobody had claimed them yet. That one answer is the whole problem.
The question on the return is not whether someone is claiming you. It is whether someone can. If a child meets the tests to be a parent’s dependent, that box must be checked, whether or not the parent ends up claiming them. The tests are the familiar ones: under 19, or under 24 and a full-time student; living at home more than half the year; and not paying more than half of their own support. A sixteen-year-old with a summer job almost never pays half their own support. The box gets checked.
Checking the box costs the child nothing
Here is the part that surprises parents. There is no longer a personal exemption to “claim yourself” with, so the child gives up nothing by admitting to being a dependent. A dependent with wages still gets a standard deduction equal to their earnings plus $450, up to the full single amount. A child who earned $6,000 has a $6,450 standard deduction, no taxable income, and gets every dollar of withholding back, box checked or not.
So the child gains nothing by leaving the box blank, and the parents can lose a great deal. That is why the answer to “who should claim the child” is, nearly always, the parents.
What the mistake costs the parents
When the child’s return goes in with the box unchecked, the parents cannot claim the child on an e-filed return. Depending on the child’s age, that means giving up one or more of these:
It can also affect head-of-household filing status for a single parent, and the Earned Income Credit for lower-income families. Colorado starts its return from federal taxable income, so whatever goes wrong federally carries straight into the state return.
Figures are for 2025 returns filed in 2026. The Child Tax Credit is $2,200 under the 2025 tax law; credit amounts and income limits change, and some credits phase out at higher incomes.
How it gets fixed
The child’s return is already filed, so it has to be corrected, not ignored. The preparer needs the parents’ documents and a copy of the return the child filed. Two things then happen, and they happen together:
- The child’s return is amended. Form 1040-X is prepared with the box checked that should have been checked. In most cases nothing else changes and no money goes back; the refund was correct, only the box was wrong. The child signs it and it is filed.
- The parents’ return is prepared claiming the child. E-file will keep rejecting it while the duplicate is on record, so the parents’ return goes in on paper. They still claim the child, and they still get the credits they were entitled to.
The IRS then matches the two returns and sorts it out. It takes months rather than weeks, and the parents may get a letter along the way, but it does get resolved. The year after, both returns are prepared in the right order: the parents’ first, the child’s second, box checked. The problem does not come back.
If the child has not filed yet, the time to talk to a preparer is before they do. Ten minutes beforehand saves four months of correspondence with the IRS.
Behind the scenes
A rejected e-file comes back with a reject code, not an explanation, and the code for a duplicated dependent is one a preparer recognizes on sight. The first question is always the same: did the child file already, and what did they answer on the dependent question? The second is a copy of the child’s return, because the amendment has to match it line for line except for the one box. What the parents do not see is that the paper return and the 1040-X move through two different parts of the IRS, and the parents’ credits are not paid until the two are reconciled; that is where the months go.
Is there ever a real choice?
For a child who qualifies as a dependent, no. The child must check the box. What the parents can choose is whether to use the dependent on their return, and there are two situations where not claiming the child is worth running the numbers on.
High-income parents with a college student
The American Opportunity Credit disappears for married couples above $180,000 of income ($90,000 single). If the parents cannot use it, the student may be able to claim the non-refundable part against their own tax, but only if they have enough income to owe tax in the first place. A student with real earnings can come out ahead; one with a part-time job usually cannot.
Divorced or separated parents
Here the question is which parent claims, not whether anyone does. The custodial parent has the right to the child, and can release the credit to the other parent year by year with Form 8332. Head-of-household status and the Earned Income Credit stay with the custodial parent regardless. Which arrangement comes out ahead depends on both parents’ incomes, and it is worth comparing before the divorce decree locks it in.
In both cases there is only one way to know: prepare the returns both ways and compare. The comparison is not the parents’ refund alone; it is what the whole family keeps, parents and child together, under each approach.
Worked example: the family total, both ways
A Colorado family from a preparer’s files: parents, and a child with a job. Each set of returns was prepared twice, once with the parents claiming the child and once with no one claiming the child. A balance due would be entered as a negative number; here every return showed a refund.
| Parents claim the child | No one claims the child | |
|---|---|---|
| Parents’ return: IRS refund | $4,587 | $975 |
| Parents’ return: Colorado refund | $1,116 | $540 |
| Child’s return: IRS refund | $178 | $2,106 |
| Child’s return: Colorado refund | $839 | $839 |
| Family total | $6,720 | $4,460 |
The family keeps $2,260 more when the parents claim the child. The child’s own refund is bigger when no one claims them, which is what makes the blank box look harmless from the child’s chair; the parents’ refund falls by far more. This is the usual result. In either column the child checks the box, because the child could be claimed. The arithmetic says which total is bigger; it cannot say whether a child may legally be claimed. That is a question of the rules above. For divorced parents, the two columns become “Parent A claims” and “Parent B claims.”
The Colorado side
Colorado starts its return from federal taxable income, so the state return simply follows whatever the federal return does. If the parents lose the child on the federal return, the Colorado return reflects it; when the federal returns are corrected, the Colorado returns follow. In the example above, the child’s Colorado refund was the same either way, while the parents’ Colorado refund rose with the federal one when they claimed the child.
What to bring your preparer
- The child’s W-2 and, if the child has already filed, a complete copy of the return they filed
- The rejection notice from the e-file, if the parents’ return has already been rejected
- The parents’ usual documents, so the parents’ return can be prepared claiming the child
- For a college student: the Form 1098-T and the parents’ income, so the American Opportunity Credit can be tested both ways
- For divorced or separated parents: the divorce decree or custody agreement, and any Form 8332 signed in earlier years
Questions people ask
The child earned the money. Doesn’t that make them independent?
Not for tax purposes. The test is whether the child paid more than half of their own support for the year, and a summer job rarely comes close. Earning money does not change who may claim the child; it only means the child may have to file a return of their own.
If my child checks the box, do they lose their refund?
No. A dependent with wages gets a standard deduction equal to earnings plus $450, up to the full single amount, so a child who earned $6,000 has no taxable income either way and gets all of their withholding back. The box changes the parents’ return, not the child’s.
Can’t the parents just e-file anyway?
Not while the child’s return is on record with the box unchecked. The e-file will keep rejecting the duplicate. The parents’ return goes in on paper, the child’s return is amended on Form 1040-X, and the IRS matches the two.
We make too much for the education credit. Should our student claim it instead?
Possibly. Above $180,000 of income on a joint return ($90,000 single), the American Opportunity Credit is gone for the parents. The student can use the non-refundable part only against tax they actually owe, so it helps a student with real earnings and does nothing for one with a small part-time job. Run the returns both ways and compare the family total.
I am the custodial parent. Can my ex claim the child?
Only if you release the claim for that year on Form 8332. Even then, head-of-household status and the Earned Income Credit stay with you. What moves is the child credit, and whether moving it helps the family depends on both incomes.
One box, nearly every time
For a child who could be claimed, the box gets checked; that is not a choice. Whether the parents then use the dependent is a choice only for high-income parents of a college student and for divorced parents deciding between them, and the way to decide is to prepare the returns both ways and compare the family total.
Published by The Tax Shop, Lone Tree, Colorado
Charles Trautman, EA · taxshop.tax · 303-734-1040