You can still file your dependent on your return regardless of the income amount as long as you can answer YES to the questions below which qualifies her as your dependent. The only thing is she need to have selected that she can be claimed as a dependent. Go ahead and file her as your dependent and if you have any issues with rejections this means she did not select she could be filed as a dependent. This can be fixed and we will help you if you need help with that if this becomes an issue.
If she filed with TurboTax she can follow these steps to amend: https://ttlc.intuit.com/replies/3288565
Unfortunately she chose that she's not being claimed as a dependent and her tax return is already filed. What can I do to fix this?
I will add the instructions above since it is a process.
Ok I see how to amend her tax return. But will it affect her refund that's she's getting?
She will still receive the refund but she may have been getting more back since she was not being claimed as a dependent so it gave her the exemption.... Once you make the change you will be able to see if it has an affect.