Texas Estates Code - EST § 124.016. Time to Initiate Actions to Recover Unpaid Estate Tax

(a) A representative required to recover unpaid amounts of estate tax apportioned to persons interested in the estate under this subchapter may not be required to initiate the necessary actions until the expiration of the 90th day after the date of the final determination by the Internal Revenue Service of the amount of the estate tax.

(b) A representative who initiates an action under this subchapter within a reasonable time after the expiration of the 90-day period is not subject to any liability or surcharge because a portion of the estate tax apportioned to a person interested in the estate was collectible during a period after the death of the decedent but thereafter became uncollectible.