Key legal question
Whether the tax authority could correct the ordinary assessment during the objection period.
Extracted holding
Yes. Because the assessment was still open and not yet final, the authority could amend it within the ordinary procedure, even to the taxpayers' detriment.
Extracted reasoning
A reassessment in the form of a recovery tax requires a final underassessment. While an assessment is pending before the authority or on appeal, it is still open and may be corrected during the objection period without special prerequisites.