Sorry she has to file her own return for her income. If they took out withholding she will probably get a W2 not a 1099NEC. She wouldn't have to file if she gets a W2 since it's under the standard deduction amount except she has to file to get back the withholding.
If she gets a 1099 she has to file for $400 or more as self employment income.
If she files a return be sure she checks the box that says she can be claimed as a dependent on someone else's return. You can still claim her since she is under 19 or under 24 and a full time student.
