No. if a taxpayer's SSN is used on another return, that person can no longer e-file. The question for her is whether or not she CAN be claimed as a dependent even if she is not. There is no requirement to claim a dependent even if you are legally entitled to do so. However, that persom must indicate on their return that they can be claimed.
here are the dependent rules
you can claim her as a qualifying child if all these tests are met
• she has the same principal abode as you for more than ½ the tax year. Temporary absences like for school are ignored
• if she is not a full-time student, she’s under 19 at the end of the tax year. If a full-time student, she’s under 24 at the end of the tax year.
• she hasn't provided over ½ her own support
• she didn't file a joint return unless there was no tax liability but merely filing jointly to facilitate refund of taxes withheld or estimates paid
or you can claim her as a qualifying relative if all these tests are met
• her gross income for 2023 less than $4,750
• you provided over ½ her support
• she isn't a qualifying child of another taxpayer
support
- Includes amounts spent for food, lodging, clothing, education, medical and dental expenses, recreation, transportation and other necessities
