Key legal question
What value forms the basis for inheritance tax on the testamentary purchase right?
Extracted holding
The tax base is the property's market value, not the testator's appraisal value, heirs' agreement value, or inventory value if different.
Extracted reasoning
Inheritance tax is determined by the market value of the inherited benefit. Contractual or testamentary internal valuation clauses are relevant for civil settlement, but not for tax assessment.