Method A
A.1 Permission 1 path:
Control Panel > System Admin > Manage User > Configure Role Permission > Customer > General Customer Module Permissions > Permission to create Credit Memo by Trade In Items
Note:
Disable the GLcode part on Trade In Page (Customer Credit Memo page) - apply for operation staff who cannot enter the accounting part.
A.2 Permission 2 path:
Control Panel > System Admin > Manage User > Configure Role Permission > Customer > Credit Memo by Branch
Method B:
Customer > Credit Memo > Create > Permission icon on top right corner