You should not report your dependent's W-2 or other earned income on your return. Your dependent may have to file their own return to claim any income they accrued or earned.
If your dependents gross income was less than $12,400 they may not be required to file a return. However, if the income was unearned (from sources such as interest, stocks, bonds, etc.) your dependent must file a return if they earned more than $1,100.
The IRS has a tool to help your dependent determine if they are required to file a return.
If you determine your child is required to file their own return, they will need to create their own account to file this return.