There are two ways to end a recruitment, either via the dashboard in the left menu or within a specific recruitment. When ending a recruitment, you can choose how you want to handle candidates who have not received feedback.
Dashboard: Under Dashboard in the left menu, you may find recruitments labeled as Should be closed. This indicates that the last application date has passed. Click on Should be closed and then follow the instructions to end the recruitment.
Recruitment: Go to the specific recruitment you want to mark as ended. In the top right menu, click End recruitment and then follow the instructions to end the recruitment.