All licensing activity occurs here: https://www.oregon.gov/osbn/Pages/index.aspx and each individual applicant must navigate to the ‘online licensing’ section to access any application.
To complete a transfer to Texas for CNA you must have an active certification from another state. You will need to complete the form 5505-NAR and form 5506-NAR and then submit that with a copy of a current photo id and criminal history check done through the Texas Department of Public Safety crime records division. The instructions will have a link for you to complete your criminal history from the TX Dept. of public safety. There is no fee to transfer your license.
Form 5505-NAR and Form 5506-NAR can be found:
States List to send 5505-NAR: