Key legal question
Whether the final transfer-tax assessment could be corrected after legal force because of a clerical/transmission error.
Extracted holding
Yes. A simple clerical transmission error may be corrected to the taxpayer's detriment even after the assessment has entered into legal force, if the error is readily identifiable and the correction respects legitimate expectations.
Extracted reasoning
The first assessment was not the result of a genuine valuation or calculation mistake, but of a simple transfer error: the already calculated tax amount was wrongly entered as the tax base and taxed again. The error was apparent from the file and the taxpayer had not shown irreversible reliance.