Hi Lily_SFP,
If the workaround provided above was not able to resolve your concern in deleting a user from a file, it would be best to receive a direct support for this specific scenario you are experiencing. With that, we recommend submitting a case through MyAccount or engage with our virtual assistant MOCA to dive deeper into issues like this.
Feel free to engage with MOCA through myob.com/support for any queries or assistance you might need. Don't worry if MOCA can't provide the help you need, our live chat team is just around the corner to pick up from where MOCA left off.
Feel free to create a post again if you require further assistance.
Best regards,
Doreen