If you are referring to your question about whether or not you can leave the question blank, the answer is yes.
When completing the interview regarding the "Kiddie Tax," not all sections will apply to your situation. It is best to leave the parts that are not applicable blank.
For more information, see:
How do I report and pay the Kiddie Tax on my 2020 return?
Topic No. 553 Tax on a Child's Investment and Other Unearned Income (Kiddie Tax) | Internal Revenue Service
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