Key legal question
Whether cantonal tax authorities had jurisdiction to decide recourse between heirs over inheritance and estate tax burden
Extracted holding
The tax and administrative authorities were not competent; the recourse claim belongs before the civil courts.
Extracted reasoning
Art. 115 StG/GR governs external tax collection and solidarity toward the fisc, but it does not regulate the internal allocation between beneficiaries once the tax debt is paid. The cantonal/communal tax scheme leaves recourse to private law and the civil judge.