Key legal question
Whether the taxpayer was entitled to child deductions for adult children in education living with the other parent.
Extracted holding
No. The cantonal rule conditioning the child deduction on cohabitation with the taxpayer was not shown to violate federal tax harmonization law or the constitutional prohibition of arbitrariness.
Extracted reasoning
For support of adult children, the harmonization act leaves social deductions to the cantons. Basel-Landschaft may reserve the higher child deduction to the parent living with the adult child in the same household; this is not untenable under arbitrariness review.