Please note: Both the invoice and credit must be an "Account" Invoice type
1. Click on the ‘+’ icon at the top right of the page, and select Customer Payment from the dropdown menu:
2. Search for the customer and double click to select:
3. Next to Available Credit, select 'Apply'.
4. The below screen shows the customer's open credits. Select the credit you want to apply.
5. Next, you need to select the invoice to apply the credit to.
a) Select which open invoice you wish to apply the credit to (you can select multiple invoices)
6. Choose the applied amount.
7. Select Apply to complete the process.