You can configure a default Category for all Sales invoices from your Company Settings. This means you don't need to assign a Category code manually to your processed Sales invoices once they’re available in your Inbox.
How to apply a default sales category
Access the company homepage.
Click Company Settings from the secondary menu.
📎NOTE: You need the Company Settings permission to access this section.
Scroll down to the Sales section under Accounting Settings.
Select the Default Sales Category from the dropdown menu.
📌TIP: You can configure the list from Manage Lists.
Remember to click Save Changes to validate.
📌TIP: Check more features around automation settings.