We can't answer why your Child Tax Credit is only $633 because we can't see your tax return. Since you indicated that you didn't work much, you probably didn't have any taxable income so you may be eligible for the refundable Additional Child Tax Credit. In order to qualify for the Additional Child Tax Credit, you must have more than $2,500 in earned income. The additional Child Tax Credit is up to $1,700 per child based on your income.
For more information, refer to the TurboTax Help articles: Child Tax Credit: Top 8 Requirements for 2025-2026, What is the Child Tax Credit?, and What is the Additional Child Tax Credit?
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