Key legal question
Whether the taxpayer could claim the child deduction for her adult daughter under cantonal/state tax law.
Extracted holding
No. For an adult child with separate residence, the deduction belongs only to the parent who predominantly supports the child; that was not proven.
Extracted reasoning
The taxpayer did not substantiate that she bore the child's support predominantly. Her asserted annual contributions were not sufficiently documented, and the child's needs exceeded them.