I became the new scrum master for the team, but we cannot find out where I can set the permissions so I can have the ability to close and start new sprints in the team?
You need to add yourself to the Manage Sprints permission of your project(s). This isn't a control this on the board.
If you are not an Jira admin, you will need to request they add you.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.