When clicking on the invoice tab you do not have an option to create a credit note, please check the Supplier Settings by following the below steps:
Click on the Admin Cogs.
Click on the Suppliers.
Click on Manage Suppliers.
Search for the relevant supplier.
Click Edit.
Click on the Order Mgt tab.
Scroll down to Other options.
Ensure the Disable Credit Creation box is not ticked.
If you do not have access to edit the supplier's details, please contact your head office or a superuser to action this for you.
