You can access the My Subscription window from the switcher.
Subscription Summary Subscription
In this screen, you can directly access Payment Information, Billing Address, Shipping Address, and more here.
You can edit your Payment Information from the widget below.
You can find your current credit card details and the option to edit it in the Payment Information module.
Enter your new credit card information and Update Payment Method.
Once you confirm, the credit card will be saved.
Similarly you can manage your Billing Address,Tax ID,Billing Name, Billing Email, and Billing Company too.
You can also manage Shipping Address.