Click your user icon (1) in the top-right of the screen and click ‘Settings’ (2):
You will be taken to the Business Settings view, scroll down on this view until you find the below two settings:
You can simply click the number to edit it. This will update the Permit dashlet, for example, changing the settings to:
Results in the Permits dashlet updating:
This affects the alerting on Permits, with the above example, when a Permit is within 25 Days of expiry it will turn yellow and when it is within 10 Days of expiry it will turn red