If you have added multiple payment methods, you can set any payment method anytime as your primary one. When you make your first purchase, the primary payment method is saved in your account.
To set a different payment method as primary:
- In the top navigation bar, click
and click Billing. 
- In the menu on the left, click Payment methods.
- Click
next to the payment method you want to set as primary and click Set as primary.
Note: If you are on a recurring subscription, the card that is used for renewing your plan automatically is the card you added as your primary payment method.