commerce-8.x-2.8/modules/tax/config/schema/commerce_tax.schema.yml

commerce_order.commerce_order_item_type.*.third_party.commerce_tax:
  type: mapping
  label: 'Tax settings'
  mapping:
    taxable_type:
      type: string
      label: 'Taxable type'

commerce_tax.commerce_tax_type.*:
  type: config_entity
  label: 'Tax type'
  mapping:
    id:
      type: string
      label: 'ID'
    label:
      type: label
      label: 'Label'
    plugin:
      type: string
      label: 'Plugin'
    configuration:
      type: commerce_tax.commerce_tax_type.plugin.[%parent.plugin]

commerce_tax.commerce_tax_type.plugin.*:
  type: commerce_tax_type_configuration

commerce_tax_type_configuration:
  type: mapping
  mapping:
    display_inclusive:
      type: boolean
      label: 'Display taxes of this type inclusive in product prices'

commerce_tax.commerce_tax_type.plugin.custom:
  type: commerce_tax_type_configuration
  mapping:
    display_label:
      type: string
      label: 'Display label'
    round:
      type: boolean
      label: 'Round tax at the order item level'
    rates:
      type: sequence
      label: 'Rates'
      sequence:
        type: mapping
        mapping:
          id:
            type: string
            label: 'ID'
          label:
            type: label
            label: 'Label'
          percentage:
            type: string
            label: 'Percentage'
    territories:
      type: sequence
      label: 'Territories'
      sequence:
        type: address_zone_territory