Hi MLK,
Thank you for the post. To update your file to show the BAS as lodged and to record the correct information, go to Accounting>Prepare BAS or IAS. Locate the draft BAS that is still sitting in MYOB and open the draft BAS form.
Since you have already lodged it via MyGov and it is visible with the ATO, you can manually mark the BAS as lodged in your MYOB software. You might need to update any relevant fields with the actual lodgment date and any payment details if applicable. Once the BAS form is updated and marked as lodged, save the changes and close the form.
Regards,
Sai