UPDATE: The SAVE Button becomes active when populating times, dates, and $/£ values for Off-Peak, Mid-Peak, AND Peak; But only when SUMMER AND WINTER's details are populated. (Fill in everything!)...

The following is the same for all 4 of my P110 Plugs! 1 - Launch Tapo App 2 - Select Device (P110) 3 - Scroll up from the bottom and select 'Show More' 4 - Should see Energy Monitoring > Energy Usage...