Hi there, @kelvin-jobling.

Thanks for posting here in the Community. Allow me to provide some clarifications about adding the description column on your invoice screen in QuickBooks Online.

To add the description column on your invoice you'll need to check on the description column on your template. Doing this adds a separate line on your invoice. 

Here's how:

1. Click on the Gear icon at the top.
2. Under Your Company, select on Custom Form Styles.
3. Select on your Invoice template.
4. Click on Content.
5. Click the middle box of the invoice.
6. Remove the check-mark for Include description here under the Products and Services.
7. Put a check-mark on Description box.
8. Click Done.

I've attached some screenshots below to guide you through the steps:

That should do it.

Please let me know how it goes. I'll be around to help if you need further assistance. Have a great day!