We understand that sometimes users will want to renew their farm account subscriptions before your current subscription has lapsed.
When a farm account subscription has 6 months or less still to run, the green "$ Extend Subscription" button will appear in the subscription column under you 'My Farms' section on your user dashboard:
As well as at the top of your farm account:
Selecting this button will open the payment screen and you can pay your subscription as normal.
The additional twelve months will be added on to the end of the current, active subscription.