reference

• getAllObjects
• getObject
  Retrieve a SoftLayer_Billing_Invoice_Tax_Type record.
• SoftLayer_Billing_Invoice_Tax_Type
  The invoice tax type data type models a single strategy for handling tax calculations.
• SoftLayer_Billing_Invoice_Tax_Type
  Invoice tax types allows the SoftLayer system to categorize the different strategies we use to calculate the tax for any invoice. There are three basic strategies in our system: don't calculate tax at all, use a basic, location-based set of rules, or offload the tax calculation to a third party that will take all related factors into account.