Student loan interest cannot be reported on her tax return because she is being claimed as a dependent on your tax return.
See IRS Form 1040 instructions on page 89 - https://www.irs.gov/pub/irs-pdf/i1040gi.pdf#page=89
Student Loan Interest Deduction
You can take this deduction only if all of the following apply.
• You paid interest in 2019 on a qualified student loan (defined later).
• Your filing status is any status except married filing separately.
• Your modified adjusted gross income (AGI) is less than: $85,000 if single, head of household, or qualifying
widow(er); $170,000 if married filing jointly. Use lines 2 through 4 of the worksheet in these instructions to figure your modified AGI.
• You, or your spouse if filing jointly, aren't claimed as a dependent on someone else's (such as your parent's) 2019 tax return.
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