Hi
Welcome to the MYOB Community Forum, I hope you find it a great source of information.
I have made a change to the account to allow you to edit these details. This change is usually reserved for listed Owners on the account however there are cases where the account is configured to have the Owner listed as someone who cannot sign into my.MYOB.
You should now be able to edit your business address following these steps:
1. Go to: my.myob.com.au
2. Sign in with the same email you used to log into the Forum.
3. Hover your mouse over My Account and click My Business Details.
4. Click the Green button: Edit Business Details.
5. Begin entering the new address into the relevant fields.
Please note you may need to sign out of my.MYOB if you are still signed in.
Please let us know how you go.