Go to the ´Payment Method´ tab in the ´My Contribution´ section to add, view, or update your Credit Card details.
Once you have added your Credit Card details, you can use the Autofill Link to use your credit card during checkout or to view and update your credit card details.
Once you click the ´Autofill link´ you will get to a verification step.
After the verification, you can view, add, and manage your credit card details.
Having issues with payments, read Troubleshooting Payment Issues