I'm using VikBooking extension and when I save, cache is not cleaned.
see here :
www.screenpresso.com/=oKlGb
How can I say to cache cleaner to clean cache when I save data on through this extension?
You should ask VikBooking if that save action sends a specific task value in the get/post data. And if so, what it is.
Then you can add that to the 'Clean on tasks' field in the Cache Cleaner system plugin settings.