Thanks for joining this conversation, @graham-hogg.

The ability to add discount per line item is currently unavailable in QuickBooks Online (QBO) South Africa. As a workaround, you can follow the steps shared by my colleague Jen_D above.

I can see how having this option would be helpful for you and your business. I'll pass along your suggestion to our Product Developers. They're always looking for ideas to consider on how to improve QBO.

In the meantime, I recommend visiting our Blog site. This is where we share recent happenings and future developments, such as updates to newly added features.

Just in case, I'll add this article for future reference: Add a discount to an invoice or sales receipt in QuickBooks Online.

Reach out to me in the comment section below if you have any other issues or concerns. I'm more than happy to answer them. Take care and enjoy the rest of the day!