Questione giuridica chiave
Whether the Zurich deduction for political party contributions is compatible with federal tax harmonization law
Decisione estratta
The cantonal deduction has no basis in the Tax Harmonization Act and is therefore harmonization- and federal-law inconsistent.
Motivazione estratta
Political party contributions are neither business expenses nor deductible voluntary donations to charitable/public-purpose entities, and they are not social deductions under the Act.