Miss. Code § 91-7-93
The executor or administrator shall, within ninety (90) days of the grant of his letters unless further time be allowed by the court or clerk, file an inventory, verified by oath, of the money and property owned by the decedent at the time of death, listing it with reasonable detail, and indicating as to each listed item, its market value as of the date of the decedent's death, and the type and amount of any encumbrance that may exist with reference to any item.
There shall be no requirement for filing an inventory if the requirement of filing an inventory is waived in the testator's will. The court or the chancellor may also waive the requirement for filing an inventory in an intestate estate upon petition to the court by the administrator. Even though the requirement of filing an inventory is waived in the testator's will or waived by the court or the chancellor upon petition to the court by the administrator in an intestate estate, the court or the chancellor may later order the executor or administrator to file an inventory upon the petition of a beneficiary or other interested party if the court or the chancellor determines that the filing of inventory is necessary or advisable.
Miss. Code § 91-7-93