Once all the test cases for a test session have a recorded result, the status of the test session will change to Testing Complete and there will be an option to mark the test session as final.
Navigate to the Test Coverage primary tab, and then to the Builds secondary tab. In the specific build's details window, click the Test Sessions tab to view the test sessions for the build. Select the test session. Once all test cases within a build are marked as either pass, fail or skip, click the Mark As Final button on the top right corner of the test session details window. Once final, you will be unable to edit the results, estimated and actual test session hours, and due date.
Users will need view and edit permissions in the test coverage module to mark a test session as final. Depending on the settings of a users project permissions, users may be able to view all project builds or just a subset of them. Project owners manage the permissions for project members.