Welcome to the Community, @fenrircustomsaz.
Adding a discount to an invoice in QuickBooks Online (QBO) is pretty easy. All you need to do is to turn on the feature. Please refer to these steps:
- In QBO, go to the Gear icon at the top to get to the Account and Settings.
- Proceed to the Sales tab at the left pane, then tick the Pencil (Edit) icon in the Sales form content section.
- Place a checkmark on the Discount box, then hit Save and Done.
After that, you can now apply a discount to the invoice. Please refer to this article and proceed to step 2 for further guidance: Add a discount to an invoice or sales receipt in QuickBooks Online.
Let me know in the comment section below if you have any other concerns or questions, and I'll get back to you as soon as possible. I'm always here to assist. Have a wonderful day!
