How to apply a CREDIT NOTE payment to an INVOICE
Go to Accounts
Search for a specific customer to show the open credit notes that you can apply on open invoices , choose open invoices, then click Search
Under the customer name, click the red box and it will show open credit notes
You can scroll down to look for the credit notes or search it by credit number
once the you have selected which credit to use click SELECT at the right > then click on the applied text to apply the credit for that invoice > then click apply payments button below
Once the credit is applied, hover on the paid amount and you can see the paid value and CR use to pay for that invoice
Important: once the CR is fully used this will not show on the red credit box