Md. Code, Estates and Trusts § 7–203

A personal representative shall make a supplemental inventory or appraisal of an item showing the market value as of the date of the death of the decedent, or the revised market value, and the appraisals or other data relied on and shall file the supplemental inventory or appraisal with the court if:

(1) Property not included in the original inventory comes to the knowledge of the personal representative; or

(2) The personal representative learns that the value indicated in the original inventory for the item is erroneous or misleading.