You can either block all applications from being submitted or block applications for just a specific property record.
To Block All Applications:
1. Go to Applications and then the Master Settings section
2. Uncheck the "Allow applications to be submitted" and select Save
To Block Applications for a Specific Property:
1. Go to Properties
2. Click on the Edit option for the particular property record
3. Go to Tab 3. Rent Amount
4. Select Yes for the "Disable Applications from being submitted?" option
5. Select Save Changes.