You never add your child's W2 to your own tax return. The child files his own return.
Assuming that the W2 represents his only income, for tax year 2022 he is not required to file a federal tax return unless his gross earned income is over $12,950. However, if his income is below that amount and federal taxes were withheld from his pay, he'd have to file a return in order to obtain a refund.
Note that your state tax filing requirements may differ.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
