Kernrechtsfrage
Whether the taxpayer could rely on documents filed for the first time before the Federal Supreme Court.
Extrahierter Entscheid
Documents created after the challenged cantonal judgment were new evidence and therefore inadmissible.
Extrahierte Begründung
Under Art. 99 LTF, new facts and evidence are excluded unless they result from the lower-court decision; the submitted 2012 documents did not meet that exception.