If I issue a customer a credit note for items they have returned and now they want to purchase different items using that credit note. how do I apply that credit note towards payment for the newly purchased items?
if you make the credit note, Manager will automatically adjust the customer balance when a new invoice is issued to the same customer.
read this guide https://guides.manager.io/7425
Isn’t happening, I have generated an invoice for the client and the credit note has not been applied. I will try deleting the invoice and re-creating it.
Further more, I had deducted a restocking fee, now the client is showing as over paid for previous invoice. So I am confused
I’ve figured it out. At the bottom of the credit note you can select the invoice number towards which to apply the credit note. This clears up the entire mess 
Thank you for pointing this out. I’ve been looking for the exact same thing! 