Licence protection for 5 devices, only need three

My subscription for five device protection is soon to be renewed.
My current need is to protect only three.
How do I adjust my subscription need from 5 to 3?

What's your geo-location/country?

Norton 360 subscription number of devices - features - entitlements may vary by geo-location/country. 

Edit: I C Nathan Peters

Depending on where you are, but usually Norton offers subscriptions for 1, 5 or 10 devices. You could find a retail Product Key still for 3 devices and in places like New Zeeland the Deluxe is for 3 devices on the Norton site. So where are you located?