Hi lerga,

The error means ATO cannot recognise your Software ID. This ID is assigned to your account for lodging your STP.

Let's check to see if the ID in your payroll settings and ATO's Access Manager matches. If your Access Manager account doesn't show the correct one, you can add the ID in your settings.

To check your software ID in QuickBooks:

1. Click the Gear icon and choose Payroll Settings.
2. On the left pane, select ATO Settings.
3. Click the Electronic Lodgement & STP tab.

After knowing your ID, you can log in to your Access Manager using your Administrator AUSkey or myGov credentials. Please refer to the screenshots in this article from KepPay: Enabling ATO Integration for Single Touch Payroll.

Please let me know if you have other questions about lodging your STP.