Your Texas driver license or ID card expiry date is extended automatically until 90 days after discharge if you are a resident on active duty stationed outside Texas, and the same goes for your spouse and dependents. Carry your military ID card along with your Texas driver license whenever you drive.
There is nothing to apply for. Carry your military ID card with your Texas driver license, and renew within 90 days of discharge.
Your military ID card and your Texas driver license or ID card.