Beginning September 1, 2019, the Oklahoma Tax Commission (OTC) will begin enforcing stricter encryption methods on the OTC website in order to provide higher security for information within the system. The new encryption methods may affect users’ experience on the OTC website and its web applications. OTC website users should upgrade their browser as necessary to support TLS 1.2 encryption. Otherwise, users will not be able to view the website and file applications past September 1, 2019. For more information, visit the OTC website. (Notice, Oklahoma Tax Commission, August 27, 2019)