You can edit your payment method from a Credit or Debit Card to PayPal and vice versa.
When you change your payment method, the next payment you do has to be done manually.
To change your payment method:
- Sign in to your Udacity account
- Click the Settings button on the bottom of the left navigation menu
- Click Subscriptions & Billing under Enrollment
- Click Pay Now for the program you wish to change the payment medium.