Can you provide the exact error message when trying to connect your ANZ account? Furthermore, for us to verify and check your account in a secure environment, kindly contact our support team.
Here's how:
In your QuickBooks Online, click the Help menu in the upper-right corner.
On the Search tab, click an article and select Contact us at the bottom. Then, enter the details of your concern.
Choose how you would like to connect with them: either via Callback or Chat.