As an Administrator, you can set a Competition to Close to stop receiving applications.
1. From the Home Page, go to Competitions and click View on the desired Competition
2. Click the Settings tab from the top bar
3. Scroll down to the Actions section, and click Close Competition
4. You will receive the following confirmation message on the top
If due to a change of plans, you are required to re- Open the completion again. Go back to the Actions section and click Open Competition