Here’s how:
1. Log in to your PayPal account.
2. Click Resolution Center.
3. Select Open Cases from the list and find the transaction.
4. Click the Case ID under the Case column.
5. Click Offer a partial refund on the case details page.
6. Enter the amount you want to offer and click Calculate to figure out the net refund amount and fee refund.
7. Click Offer refund.
You can issue a partial refund within 60 days of receiving a payment. When you issue a partial refund, PayPal credits a portion of your original transaction fee.