You must have "Full Access" or "Limited Access - Financials" permissions.
NOTE: If the order or invoice status displays Paid in Full, you must issue a refund instead. Only Open or Past Due orders and invoices can have a credit applied.
Click Financials > Invoicing or Orders from the left navigation menu.
Locate the invoice or order, then click the Sale ID.
Click the three dots icon > Apply Credit in the top right corner.
Enter the amount to credit.
If multiple installments are open, check the box for the installment to which the credit should apply. The amount box displays once you check an installment.
This action cancels the payments for the credited invoice or registration orders.
NOTE: To cancel all remaining payments, check all the installments and enter the amount to credit. The total Credit Amount must equal the Total Outstanding at the bottom right.
Click Apply.