Hey Ck63,
Thanks for sharing the details of the error you're seeing with your STP report. While I haven't come across that exact ATO error code before, you're definitely not alone in encountering issues like this during STP submissions. That said, I have here a helpful link that lists common STP error codes and what they mean. Once you've found the error code, there's a recommended action or fix you can follow. If none of the listed error codes match yours, you can reach out to our support team directly on Live Chat via our virtual assistant, MOCA, or by submitting a support case via MyAccount.
Cheers,
Doreen