Miss. Code Ann. § 27-10-11: Method of proration.

(1) The fiduciary or other person required to pay the tax may withhold from any property of the decedent in his possession, distributable to any person interested in the estate, the amount of tax attributable to his interest. If the property in possession of the fiduciary or other person required to pay the tax and distributable to any person interested in the estate is insufficient to satisfy the proportionate amount of the tax determined to be due from the person, the fiduciary or other person required to pay the tax may recover the deficiency from the person interested in the estate. If the property is not in the possession of the fiduciary or the other person required to pay the tax, the fiduciary or the other person required to pay the tax may recover from any person interested in the estate the amount of the tax apportioned to the person in accordance with this chapter.

(2) If property held by the fiduciary or other person is distributed prior to final apportionment of the tax, the fiduciary or other person may require the distributee to provide a bond or other security for the apportionment liability in the form and amount prescribed by the fiduciary, with the approval of the chancery court having jurisdiction of the administration of the estate.