Hi suzannengiv
Thanks for your post. To check what is causing that warning click on Update details. You can also check the error code in STP reporting centre>>Reports tab>>click on the report to view the error code.
The Help Article, Check payroll details for STP, has detailed information to assist with this. If you need further assistance please provide the error code or a screenshot of the Check Payroll details window.
Please let me know how you go.
If my response has answered your enquiry please click "Accept as Solution" to assist other users find this information.