Unless she's required to file a return (see below) it's very likely that it would be best if you claim her as a dependent, assuming that she qualifies. Please see the rules for who you can claim as a dependent: https://turbotax.intuit.com/tax-tips/family/rules-for-claiming-a-dependent-on-your-tax-return/L8LODb...
An unmarried dependent student must file a tax return if his or her earned or unearned income exceeds certain limits. To find these limits, refer to Dependents under Who Must File in Publication 501, Dependents, Standard Deduction and Filing Information. You can also refer to Do I Need to File a Tax Return? to see if your income requires you to file.
Even if you don't have to file a federal income tax return, you should file if you can get money back (for example, you had federal income tax withheld from your pay or you qualify for a refundable tax credit). See Who Should File in Publication 501 for more examples.
If you're single single under 65 and your gross income is $12,400 or more then you must fine a tax return.
Gross income means all income you receive in the form of money, goods,
property, and services that isn't exempt from tax, including any income from sources
outside the United States or from the sale of your main home (even if you can exclude
part or all of it).
Answers are correct to the best of my ability but do not constitute legal or tax advice.
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