This is the process to create a M2M credential:
1. Log into https://info.authorisationmanager.gov.au/.
2. Link your user to your ABN in Relationship Authorisation Manager. You will have the option to "Manage Credentials".
3. Add the internet extension "addons" for the ATO in your browser security settings:
You need a supported browser.
4. Make sure you can see the button "Create Machine Credential"
Creating a machine credential allows you to download a keystore file to your PC or network.
Use "Manage Authorisations" to make sure your myGovID allows all new machine credentials to have auto access to business appointments.