Tex. Estates Code § 1154.051

(a) Not later than the 30th day after the date the guardian of the estate qualifies, unless a longer period is granted by the court, the guardian shall file with the court clerk a single written instrument that contains a verified, full, and detailed inventory of all the ward's property that has come into the guardian's possession or of which the guardian has knowledge. The inventory must:

(1) include:

(A) all the ward's real property located in this state; and

(B) all the ward's personal property regardless of where the property is located; and

(2) specify:

(A) which portion of the property is separate property and which is community property; and

(B) if the property is owned in common with other persons, the ward's interest in that property.

(b) The guardian shall:

(1) set out in the inventory the guardian's appraisement of the fair market value of each item in the inventory on the date of the grant of letters of guardianship; or

(2) if the court has appointed an appraiser for the estate:

(A) determine the fair market value of each item in the inventory with the assistance of the appraiser; and

(B) set out in the inventory the appraisement made by the appraiser.

(c) The court for good cause shown may require the guardian to file the inventory and appraisement not later than the 30th day after the date of qualification of the guardian.

(d) The inventory, when approved by the court and filed with the court clerk, is for all purposes the inventory and appraisement of the estate referred to in this title.