Questione giuridica chiave
Whether the taxpayer had to explain the substantial drop in declared wealth and cooperate with the assessment authority.
Decisione estratta
Yes. The taxpayer had a comprehensive duty to cooperate and should at least have explained the reasons for the reduction in wealth.
Motivazione estratta
Art. 42 and 46 StHG, as well as cantonal tax law, require active cooperation; the authority may inquire into a drastic decrease in assets, and the request for a mere explanation was proportionate.