Like for any other plugin, in order to modify permissions for Finance, you should go to Administration -> Roles and permissions. Click on a role you would like to modify, and then scroll down to the Finance section. Enable or Disable the appropriate fields:
Finance
- View finance
- Add operations
- Edit operations
- Edit own operations
- Delete operations
- Comment operations
- Delete comments
- Manage operation invoices
- Manage operation relations
- Import operations
- Approve operations
- Manage public queries
- Save queries
- Edit accounts
- Delete accounts
Please check the below screenshot reference to make the situation more clear: