openapi: 3.0.3
info:
  title: TaxJar Sales Tax Categories Transactions - Refunds API
  description: REST API for real-time sales tax calculation, rooftop-level rate lookups, tax category listing, transaction management (orders and refunds), customer exemption management, nexus region tracking, address validation, and VAT validation. Supports token-based authentication via Authorization header. TaxJar is a Stripe company providing sub-20ms response times and 99.999% historical uptime.
  version: '2.0'
  contact:
    name: TaxJar Developer Support
    url: https://support.taxjar.com/category/233-taxjar-api
  termsOfService: https://www.taxjar.com/terms/
  x-api-id: taxjar-sales-tax
servers:
- url: https://api.taxjar.com/v2
  description: Production
- url: https://api.sandbox.taxjar.com/v2
  description: Sandbox
security:
- bearerAuth: []
tags:
- name: Transactions - Refunds
  description: Refund transaction management
paths:
  /transactions/refunds:
    get:
      operationId: listRefunds
      summary: List refund transactions
      description: Returns a list of refund transaction IDs for the authenticated account. Supports filtering by date range and provider.
      tags:
      - Transactions - Refunds
      parameters:
      - name: transaction_date
        in: query
        description: Filter refunds by exact transaction date (YYYY-MM-DD)
        schema:
          type: string
          format: date
      - name: from_transaction_date
        in: query
        description: Start date filter (YYYY-MM-DD)
        schema:
          type: string
          format: date
      - name: to_transaction_date
        in: query
        description: End date filter (YYYY-MM-DD)
        schema:
          type: string
          format: date
      - name: provider
        in: query
        description: Filter by provider
        schema:
          type: string
      responses:
        '200':
          description: List of refund transaction IDs
          content:
            application/json:
              schema:
                type: object
                properties:
                  refunds:
                    type: array
                    items:
                      type: string
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createRefund
      summary: Create a refund transaction
      description: Creates a new refund transaction linked to an order transaction.
      tags:
      - Transactions - Refunds
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RefundRequest'
      responses:
        '201':
          description: Refund transaction created
          content:
            application/json:
              schema:
                type: object
                properties:
                  refund:
                    $ref: '#/components/schemas/Refund'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '422':
          $ref: '#/components/responses/UnprocessableEntity'
  /transactions/refunds/{transaction_id}:
    get:
      operationId: showRefund
      summary: Show a refund transaction
      description: Returns a single refund transaction by transaction ID.
      tags:
      - Transactions - Refunds
      parameters:
      - name: transaction_id
        in: path
        required: true
        description: Unique identifier for the refund transaction
        schema:
          type: string
      - name: provider
        in: query
        description: Provider for the transaction
        schema:
          type: string
      responses:
        '200':
          description: Refund transaction details
          content:
            application/json:
              schema:
                type: object
                properties:
                  refund:
                    $ref: '#/components/schemas/Refund'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateRefund
      summary: Update a refund transaction
      description: Updates an existing refund transaction by transaction ID.
      tags:
      - Transactions - Refunds
      parameters:
      - name: transaction_id
        in: path
        required: true
        description: Unique identifier for the refund transaction
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RefundRequest'
      responses:
        '200':
          description: Updated refund transaction
          content:
            application/json:
              schema:
                type: object
                properties:
                  refund:
                    $ref: '#/components/schemas/Refund'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteRefund
      summary: Delete a refund transaction
      description: Deletes an existing refund transaction by transaction ID.
      tags:
      - Transactions - Refunds
      parameters:
      - name: transaction_id
        in: path
        required: true
        description: Unique identifier for the refund transaction
        schema:
          type: string
      - name: provider
        in: query
        description: Provider for the transaction
        schema:
          type: string
      responses:
        '200':
          description: Deleted refund transaction
          content:
            application/json:
              schema:
                type: object
                properties:
                  refund:
                    $ref: '#/components/schemas/Refund'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    LineItem:
      type: object
      properties:
        id:
          type: string
        quantity:
          type: integer
        product_identifier:
          type: string
        description:
          type: string
        product_tax_code:
          type: string
        unit_price:
          type: number
          format: float
        discount:
          type: number
          format: float
        sales_tax:
          type: number
          format: float
    LineItemRequest:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the line item
        quantity:
          type: integer
          description: Quantity of the item
          example: 1
        product_identifier:
          type: string
          description: Product SKU or identifier
        description:
          type: string
          description: Description of the product
        product_tax_code:
          type: string
          description: Product tax code for category-specific rates
        unit_price:
          type: number
          format: float
          description: Unit price of the item
          example: 15.0
        discount:
          type: number
          format: float
          description: Discount amount for this line item
        sales_tax:
          type: number
          format: float
          description: Sales tax collected for this line item
    RefundRequest:
      type: object
      required:
      - transaction_id
      - transaction_date
      - transaction_reference_id
      - to_country
      - to_zip
      - to_state
      - amount
      - shipping
      - sales_tax
      properties:
        transaction_id:
          type: string
          description: Unique identifier for this refund transaction
          example: '321'
        transaction_date:
          type: string
          description: Date of the refund (YYYY-MM-DD or ISO 8601)
          example: 2015/05/14
        transaction_reference_id:
          type: string
          description: Transaction ID of the original order being refunded
          example: '123'
        provider:
          type: string
          description: Source of the transaction
          example: api
        exemption_type:
          type: string
          description: Exemption type
          enum:
          - wholesale
          - government
          - other
          - non_exempt
        from_country:
          type: string
          example: US
        from_zip:
          type: string
        from_state:
          type: string
        from_city:
          type: string
        from_street:
          type: string
        to_country:
          type: string
          example: US
        to_zip:
          type: string
          example: '90002'
        to_state:
          type: string
          example: CA
        to_city:
          type: string
        to_street:
          type: string
        amount:
          type: number
          format: float
          example: 16.5
        shipping:
          type: number
          format: float
          example: 1.5
        sales_tax:
          type: number
          format: float
          example: 0.95
        line_items:
          type: array
          items:
            $ref: '#/components/schemas/LineItemRequest'
    Refund:
      type: object
      properties:
        transaction_id:
          type: string
          example: '321'
        user_id:
          type: integer
        transaction_date:
          type: string
          example: '2015-05-14T00:00:00Z'
        transaction_reference_id:
          type: string
          example: '123'
        provider:
          type: string
          example: api
        exemption_type:
          type: string
        from_country:
          type: string
        from_zip:
          type: string
        from_state:
          type: string
        from_city:
          type: string
        from_street:
          type: string
        to_country:
          type: string
        to_zip:
          type: string
        to_state:
          type: string
        to_city:
          type: string
        to_street:
          type: string
        amount:
          type: number
          format: float
        shipping:
          type: number
          format: float
        sales_tax:
          type: number
          format: float
        line_items:
          type: array
          items:
            $ref: '#/components/schemas/LineItem'
    Error:
      type: object
      properties:
        error:
          type: string
          description: Error type
        detail:
          type: string
          description: Human-readable error detail
        status:
          type: integer
          description: HTTP status code
  responses:
    Unauthorized:
      description: Unauthorized - invalid or missing API token
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    UnprocessableEntity:
      description: Unprocessable entity - validation error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: Bad request - invalid parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Use your TaxJar API token. Format: "Bearer [token]" or "Token token=[token]"'