It depends. If the income was not self-employment income, then there is no need to file the return since the income is less than the standard deduction for single filers which is $12,550.
However, if the income was made through self-employment income then she needs to file a tax return.
Additionally, if the income was made through a job, while there is no need to file a return, if taxes were withheld then she can file her tax return to get that money back as a refund.
