Only certain data fields can change after the creation of a recurring transaction. While the credit card number is not editable, the expiration date, Name on Card and billing address information can be updated. You can modify the credit card information within the Customer Accounts>Stored Credit Cards menu.
The other recurring transaction data sets that are not editable are Schedule, Transaction Type, Line Item Detail, Tracking Information, Tracking Totals. If you need to modify any of these fields, you will need to stop the current recurring transaction instance and create a new one. Please reference the below articles on how to stop a recurring transaction and create a recurring transaction.