How do I renew or make changes to my existing subscription?

If you have an existing subscription you would like to renew or add to, follow these steps:

1. Once your selections are added to the shopping cart, select Proceed to Checkout. You will then be asked to log in. 

2. Log in using the user name associated with the subscription you wish to update. 

3. Once you log in, select the customer number associated with the existing subscription. In the shopping cart, choose Renew Existing Subscription or Select a Subscription. Your purchase will now be associated with the subscription you selected.