A client hands you a W-2, a Marketplace statement, and a bank letter from Lisbon. Three separate reporting regimes just opened, and none of them appears on the return you were about to prepare.
Whether someone counts as a dependent drives several credits on the return, so you settle dependency before you look at credits. A dependent is either a qualifying child or a qualifying relative. Those are two separate routes with their own tests, but before you try either one, the person has to clear three conditions that apply to both.
Any one of these three conditions rules out dependency, whichever route you use:
- Dependent taxpayer rule: a person who is claimed as a dependent by someone else cannot turn around and claim dependents of their own.
- Joint return rule: the person cannot file a joint return with a spouse. The one exception is a joint return filed only to claim a refund of income tax withheld...
- Citizenship or residency: the person must be a United States citizen, national, or resident, or a resident of Canada or Mexico.
Common mistakes
- Applying the gross-income test to a qualifying child. Earning $18,000 doesn't stop a 22-year-old student from being a qualifying child. Only the qualifying-relative route has an income ceiling.
- Checking the child tax credit box for a 17-year-old. The child must be under 17 at year end for the $2,200 credit. A 17-year-old gets $500 under the credit for other dependents instead.
- Treating a Form 8332 release as transferring everything. The release moves only the child tax credit, the credit for other dependents, and the education credits. It never moves head of household, the earned income credit, or the dependent care credit.
Bottom line
- Qualifying child tests relationship, age with the younger-than-taxpayer condition, residence over half the year, and self-support; only the qualifying-relative route has a gross-income ceiling.
- CTC is $2,200 per child under 17 with a work-eligible SSN, up to $1,700 per child is refundable, and ODC is $500; a Form 8332 release moves only CTC, ODC, and education credits.
- Adoption credit maximum is $17,280, of which $5,000 per child is refundable, and the nonrefundable remainder carries forward 5 years.
- Tax payments are withholding, 2025 estimates due April 15, June 16, and September 15, 2025, extension remittances, and applied prior refunds; refundable credits sit on separate lines.
Exam shortcut
Run dependency before credits, always. The stem gives you an age and an income number; ask which route you are on before you use the income at all. Earnings on the qualifying-child route are a distractor. When a stem names a foreign account, answer twice.
The full lesson (about 6,573 words, 44 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
- 1
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