You can refund orders that are paid by PayPal Express Checkout from within NetSuite and do not need to log in to the PayPal web site separately. After PayPal Express Checkout is enabled and set up, transactions initiated using either the Express Checkout button or the PayPal payment option are both refundable.
You can apply a full refund, partial refund or multiple refunds to orders processed and captured using PayPal Express Checkout, as long as the total refund amount is less than or equal to the original transaction amount. You cannot refund transactions if funds have not yet been captured.
If PayPal Express Checkout is not enabled, then transactions processed using the PayPal payment option cannot be refunded from within NetSuite.