In order to use TNT Australia, you'll need to ensure you are using a valid Australian address as your store location. You'll also need to ensure your Craft Commerce default currency is set to AUD.
The below service are available with TNT Australia for domestic customer destination addresses.
Add the following code to your configuration file under the providers array, as per the below. Note that to disable certain services, simply omit them from the services array.
'providers' => [
'tntAustralia' => [
'name' => 'TNT Australia',
'settings' => [
'accountNumber' => 'xxxxxxxxx',
'username' => 'xxxxxxxxxxxxxxxxxx',
'password' => 'xxxxxxxxx',
],
'services' => [
'EX10' => '10:00 Express',
'EX12' => '12:00 Express',
],
],
]