Hi there, breaskevenbooks,
I've received reports that some customers are getting STP lodgement error. However, they're able to fix it.
The recommended steps to get rid of the error is to verify your ATO settings. To do so, I suggest contacting ATO to match the required settings. Make sure to verify the Software Provider and Software ID. These details are used to identify this business to the ATO during electronic enlargements.
To get in touch with them, you can refer to this article: How do I enable Single Touch Payroll?. Then, go to the Phone the ATO section to get the phone number. Also, this link provides steps on how to set up ATO Supplier Settings and Electronic Lodgements & STP.
Let me know how the call goes by leaving a comment below. I'm always around to help you out.
