Kernrechtsfrage
Whether the cantonal court violated constitutional rights by refusing revision of the 2001 tax decision.
Extrahierter Entscheid
The complaint showed no reviewable constitutional violation; the refusal to revise was upheld.
Extrahierte Begründung
Revision under § 155 StG covers procedural mistakes or overlooked decisive facts, not a new legal assessment, scholarly criticism, or changed case law. The taxpayer relied only on such non-revision grounds.