Student status is not determined as-of the end of the year. The wording in the Form 8615 instructions is a little ambiguous. The phrase "at the end of 2023" refers to the age, not to "was a full-time student." Student is defined in IRS Publication 501. It means being a full-time student "during some part of each of any 5 calendar months of the year." Since she was a full-time student from January through June, she is considered a full-time student for the year.
However, it doesn't matter that she was a full-time student because her earned income was more than half of her support. Go back to the Personal Info section in TurboTax and go through the questions again. You can say that she was a full-time student. After it asks about being a student, you will come to a screen that says "Did You Support Yourself in 2023?" Select "Yes, I provided over half of my support with earned income." Continue through the questions until you get back to the Personal Info Summary. You will then be able to delete Form 8615 and it will not reappear.
Whether the "child" is claimed as a dependent or not does not affect whether Form 8615 is required.
This answer has been verified for accuracy by an Intuit expert employee
