One of my dependents worked a summer job, how do I enter her income?

[DawnC0]

Their income does not get reported on your return.  Your dependent can file his or her own tax return and receive a refund of their tax paid.  Prepare a return in his or her name, indicating that he or she can be claimed as a dependent on someone else's return.  

Dependents must file a return if they have more than $6,300 earned (or more than $1,050 unearned) or more than $400 of self-employment earnings.  But even if they have less than that in earned income, it is beneficial for the child to file a return to get a refund of their federal withholdings.