Hi, Sam_P
Thanks for your post.
Please confirm if you are seeing the nil amount under the STP reports window. If yes, this happens when an update event has been sent. This is also to make sure that the ATO will receive the most up-to-date figures for your employees. To check if the figures are correct, you may check the Payroll Activity and Payroll Register Summary reports. To do this, go to Reports > Click the Payroll tab > Run Activity Summary and Register Summary. Please refer to the screenshot below.

Please let us know if you require any further assistance with your concern.
Best regards,
Doreen