Question juridique clé
Whether the Federal Supreme Court could enter into the ESTV's appeal against the remand judgment.
Solution extraite
The remand judgment was an interlocutory decision, and neither an irreparable harm nor an immediately appealable final decision under Art. 93 BGG was shown.
Motifs extraits
The remand left the ESTV with discretion to re-examine the case; any harm was only procedural delay. Success on appeal would not immediately end the case, because the Federal Administrative Court would still need to examine the merits.