If your child is a full-time college student, you can claim them as a dependent until they are 24. If they are working while in school, you must still provide more than half of their financial support to claim them.
Be aware that if your student meets any of the requirements below, they must file their own return. You may be able to claim them as a dependent even if they file their own return.
If your student is single, they usually are required to file a federal return if any of the following applies:
They have more than $1,100 of unearned income
They earn more than $12,400
If your student is married, they usually are required to file a federal return if any of the following applies:
They have more than $1,100 of unearned income
They earn more than $12,400
Their gross income was at least $5, and their spouse files a separate return and itemizes deductions