All issued invoices can be found by opening the menu bar (≣) and clicking on "Invoices" under "Sales." From there, you can process refunds.
To issue a refund, first find the invoice by searching for the customer’s name or selecting a specific time period. Once you locate the invoice, click on it, and then select "Refund."
Full refund
If you want to refund the entire invoice, simply select the payment method that was used to refund it.
Partial refund
To issue a partial refund, enter the refunded amount in the "To Refund" column and then select the payment method that was used to refund it.
