Question juridique clé
Whether the Federal Court appeal against the cantonal remand judgment was admissible despite the decision being incidental.
Solution extraite
The remand judgment was incidental, and the appeal was filed too late; it was therefore inadmissible.
Motifs extraits
The remand order did not finally decide the merits but only required further investigation. For such incidental decisions, the administrative appeal deadline was 10 days. The appellant could not rely on the erroneous indication of a 30-day deadline because a tax authority is presumed to know the law.