Key legal question
Whether the federal administrative law appeal was admissible against the cantonal remand decision.
Extracted holding
The remand decision was treated as a final decision in part because it definitively resolved the scope of the tax authority's investigatory duty in official assessment proceedings.
Extracted reasoning
Although formally a remand, it conclusively settled whether the tax authority had to carry out further investigations under Arts. 130 and 132(3) DFTA, so it was reviewable.