Questione giuridica chiave
Whether the Federal Administrative Court wrongly remanded the case for consideration of the Switzerland–Netherlands tax treaty.
Decisione estratta
Yes. The tax authority was not required to examine treaty relief ex officio when the refund request was filed only under domestic law forms and rules.
Motivazione estratta
A withholding tax refund is optional; domestic law and the treaty require different formal requests. Requiring the correct form is not excessive formalism.