Question juridique clé
Whether the Federal Administrative Court's remand judgment was appealable to the Federal Supreme Court.
Solution extraite
The appeal was admissible because the remand judgment could cause an irreparable disadvantage and the dispute covered the whole tax relationship.
Motifs extraits
A remand decision is generally interlocutory, but appeal is possible under Art. 93 BGG when irreparable harm may result. The authority could no longer later challenge the issue once the new final decision was rendered.