From the ‘Invoices’ tab, you can change any scheduled payment unless it has already started processing. To change an invoice that is scheduled for one-time payment, select it from the ‘Invoice’ page and click ‘Edit payment details.’ In the window that opens, you can change the payment account and payment date, or cancel the payment altogether.

If the invoice is enrolled in auto-pay, instead you’ll see a button that reads ‘Edit Auto Pay details.’ For more information on changing Auto Pay settings, see here.