Questão jurídica principal
Whether the cantonal court wrongly refused revision of the final tax assessment under § 171 Aargau Tax Act.
Decisão extraída
Revision was unavailable because the taxpayers relied on an argument they could and should have raised in the original assessment proceedings.
Fundamentação extraída
A revision ground under § 171 requires facts or evidence that were genuinely unknown despite due diligence, or procedural defects that could not have been challenged by an ordinary remedy. The taxpayers' objection to territorial tax jurisdiction based on the death of the general partner was foreseeable and should have been raised earlier.