Hello there, @mishhobbs84.
I can help add the ABN to your invoices in QuickBooks Online (QBO).
Here's how:
- Go to the Sales menu, and then click Customers.
- Select the customer’s name that you want to run, and then click Edit.
- Under the Tax info tab, enter the ABN in the Tax reg. no.
- Click Save.
Once done, let's customise the invoice to appear the ABN. I'll guide you how:
- Go to the Gear icon.
- Under Your Company, select Custom form styles.
- Find the invoice template you use and then click Edit.
- Click the Content tab, then select the top box of the preview page.
- Scroll down and place a checkmark on the box beside Customer ABN under the Display section.
- Click Save.
I've also added this link about customising invoices in QuickBooks Online (QBO): Customise invoices, quotes, and sales receipts.
Don't hesitate to drop a comment below if you have other questions. I'm more than happy to help. Take care!