Key legal question
Whether the revised gift-tax assessment could be corrected under § 169 StG as a clerical or calculation mistake.
Extracted holding
The correction was unlawful because the authority did not only fix a transfer error, but also cured an assessment error in valuation.
Extracted reasoning
§ 169 StG covers only expression errors, not errors in will formation or legal assessment. The authority’s later recalculation went beyond a mere copying/reading mistake and changed the valuation substantially, so the original assessment could not be corrected to the taxpayer’s detriment.