Can I prevent employees from submitting expenses over a certain amount?

No, it is not possible to directly prevent an employee from submitting an expense over a specific value or amount. However, you can restrict employees from entering expenses on a project beyond their allocated units by applying the rule Prevent expense entry after reaching allocated units in the Projects > Settings > Assignment tab. This ensures that employees cannot record expenses exceeding the assigned allocation, though it controls by units rather than dollar amount. Check CORE Help Center for more details.