Questão jurídica principal
Whether the Federal Administrative Court's remand judgment was appealable to the Federal Supreme Court.
Decisão extraída
The appeal was admissible because the remand judgment could cause an irreparable disadvantage and the dispute covered the whole tax relationship.
Fundamentação extraída
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.