Hi caroleob,
I understand how concerning it can be when discrepancies arise between your MYOB records and the ATO's pre-filled figures, especially after you've taken the necessary steps to ensure accuracy.
You can delete the draft of your BAS and set it up again. When you recreate it, ensure that the linked payroll categories are set up correctly. This can help to pull in the correct figures from your MYOB data, including the updates you made.
Alternatively, you can manually adjust the figures in the relevant boxes on your BAS to reflect the correct gross pays and PAYG withholding amounts. This will allow you to lodge the BAS with the correct figures, despite the discrepancy.
Regards,
Sai
