reference

• getAllObjects
• getObject
  Retrieve a SoftLayer_Billing_Invoice_Tax_Status record.
• SoftLayer_Billing_Invoice_Tax_Status
  The invoice tax status data type models a single status or state that an invoice can reflect in regard to an integration with a third-party tax calculation service.
• SoftLayer_Billing_Invoice_Tax_Status
  Invoice tax status allows the SoftLayer system to track the status of an invoice if the related tax is being calculated by a third-party service. This allows us to know when tax has been calculated and applied successfully and when it has not.