You can specify permission settings for Test Management for Jira for each of the following areas:
Permissions can be set for three different user types: individual users, project roles, or groups.
You probably don't want every person on your team to have the same level of access to Test Management for Jira. For example, you may want to limit who has the authority to change configuration settings, delete test cases, delete test executions, etc.
Regardless of what kinds of changes you want to make to permissions—even if you want to disable the permission system completely—you can set your plan in action in Jira's project administration settings.