Filing as a single adult, still have a form 8615 on me, why?

For tax year 2021, the Kiddie Tax applies if your (you) child has unearned income (usually from investments) exceeding $2,200.

Form 8615 must be filed for any child who meets all of the following conditions.

1. The child had more than $2,200 of unearned income.
2. The child is required to file a tax return.
3. The child either:
4. 17 or younger at the end of 2021
5. 18 at the end of 2021, but only if their earned income (excluding scholarships in the case of a full-time student) didn’t exceed half of their support costs in 2021.
6. Was a full-time student at least age 19 and under age 24 at the end of 2021 and didn’t have earned income that was more than half of the child's support.
7. (Unearned income and support are defined below.
8. At least one of the child's parents was alive at the end of 2021.
9. The child doesn’t file a joint return for 2021.

For these rules, the term “child” includes a legally adopted child and a stepchild. These rules apply whether or not the child is a dependent. These rules don’t apply if neither of the child’s parents were living at the end of the year.

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@robocop6586 wrote:
I am a single adult full-time student and TurboTax has marked me up as a child with unearned income, now I must fill out a form 8615 which is not applicable and will be fraud. Will likely use H

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This is what the IRS says:   (Does 3a, 3b OR 3c apply to you?  If they do then 8615 is required.)

Who Must File
Form 8615 must be filed for any child who meets all of the following
conditions.
1. The child had more than $2,200 of unearned income.
2. The child is required to file a tax return.
3. The child either:
a. Was under age 18 at the end of 2021,

b. Was age 18 at the end of 2021 and didn’t have earned
income that was more than half of the child's support, or
c. Was a full-time student at least age 19 and under age 24 at
the end of 2021 and didn’t have earned income that was more than
half of the child's support.
(Earned income is defined later. Support is defined below.)
4. At least one of the child's parents was alive at the end of
2021.
5. The child doesn’t file a joint return for 2021.