With the help of Extra Fee, you can create additional charges that can be both refundable or not, depending on your requirements. Let's take a look at that in detail.

       Contents:

      1. Setting up a fee:

            a) Non-refundable fee;

            b) Refundable fee;

      2. Issuing a refund for:

            a) Orders with non-refundable fees;

            b) Orders with refundable fees.

            1. Setting up a fee:

      To start with creating a fee, please go to Magento Admin Panel > Stores > Configuration > Amasty Extensions > Extra Fee > Fees and select 'Add New Fee'. To determine a fee type, navigate to the 'General' tab and locate the 'Eligible for Refund' setting.

       a) Refundable Fee. This fee type should have Eligible for Refund - Yes:

      b) Non-refundable Fee. Here the setting should have the opposite value, Eligible for Refund - No:

      The remaining settings, including fee options and application conditions, can be configured depending on your preferences.

            2. Issuing a refund:

      As for creating refunds, the behavior of fees will depend on the setting you've chosen. To issue a refund, please open an invoiced order and select the 'Credit Memo' option:

      a) Orders with non-refundable fees. Even though a non-refundable fee is visible under order details, it'll be hidden during credit memo creation:

      b) Orders with refundable fees. In this case, the fee line will be visible when issuing a credit memo, and you'll be able to determine the amount you'd like to refund:

      If you wish to change the refunded amount, please edit the number inside the corresponding fee field and click the 'Update Totals' button:

      When you complete this refund, the order totals will be updated according to the amount you specified in the field: