Changing my subscription from a computer that died

How do I change a subscription to Norton 360 to a new computer once it has being used for 100 days on a computer that has died    I have a 3 computer version and all subscriptions have been used

Thanks for prompt reply worked perfectly

How do I change a subscription to Norton 360 to a new computer once it has being used for 100 days on a computer that has died    I have a 3 computer version and all subscriptions have been used