Avalara Tax Calculation API

openapi: 3.1.0
info:
  title: Avalara 1099 & W-9 1099 Forms Tax Calculation API
  description: The Avalara 1099 and W-9 API automates collection, validation, and e-filing of IRS forms including 1099 variants (1099-NEC, 1099-MISC, 1099-K, 1099-INT, 1099-DIV), 1095 forms, W-2, and 1042-S. It provides endpoints for creating, updating, managing, and filing various IRS information returns.
  version: '1.0'
  contact:
    name: Avalara Developer Relations
    url: https://developer.avalara.com/
    email: developer.relations@avalara.com
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
  termsOfService: https://legal.avalara.com/#siteterms
servers:
- url: https://api.avalara.com/1099/v1
  description: 1099 API Production
- url: https://api.sbx.avalara.com/1099/v1
  description: 1099 API Sandbox
security:
- bearerAuth: []
tags:
- name: Tax Calculation
  description: Calculate Brazilian taxes on transactions
paths:
  /calculations:
    post:
      operationId: calculateTax
      summary: Avalara Calculate Brazilian Taxes
      description: Calculates applicable Brazilian taxes for a transaction including ICMS, IPI, PIS, COFINS, ISS, and other applicable taxes based on product type, origin, and destination.
      tags:
      - Tax Calculation
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CalculationRequest'
      responses:
        '200':
          description: Tax calculation results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CalculationResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /api/v2/afc/CalcTaxes:
    post:
      operationId: calcTaxes
      summary: Avalara Calculate Taxes on a Transaction
      description: Calculates communications taxes for one or more line items based on transaction type, service type, and jurisdiction information. Supports both individual and batch tax calculations.
      tags:
      - Tax Calculation
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CalcTaxesRequest'
      responses:
        '200':
          description: Tax calculation results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CalcTaxesResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /api/v2/afc/commit:
    post:
      operationId: commitTransaction
      summary: Avalara Commit a Transaction
      description: Commits a previously calculated transaction, finalizing it for tax reporting purposes.
      tags:
      - Tax Calculation
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CommitRequest'
      responses:
        '200':
          description: Transaction committed successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CommitResponse'
  /api/v2/afc/CalcAdj:
    post:
      operationId: calcAdjustment
      summary: Avalara Calculate Adjustment Taxes
      description: Calculates taxes for adjustments (credits, refunds) on previously committed transactions.
      tags:
      - Tax Calculation
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CalcAdjRequest'
      responses:
        '200':
          description: Adjustment tax calculation results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CalcTaxesResponse'
components:
  schemas:
    LineItemResult:
      type: object
      properties:
        ref:
          type: string
          description: Line item reference
        txs:
          type: array
          items:
            $ref: '#/components/schemas/TaxResult'
    CommitResponse:
      type: object
      properties:
        ok:
          type: boolean
    Invoice:
      type: object
      properties:
        doc:
          type: string
          description: Document code
        cmmt:
          type: boolean
          description: Commit indicator
        bill:
          $ref: '#/components/schemas/Location'
        cust:
          type: integer
          description: Customer type
        date:
          type: string
          format: date-time
          description: Invoice date
        itms:
          type: array
          items:
            $ref: '#/components/schemas/LineItem'
          description: Line items on the invoice
    InvoiceResult:
      type: object
      properties:
        doc:
          type: string
          description: Document code
        itms:
          type: array
          items:
            $ref: '#/components/schemas/LineItemResult'
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
    CommitRequest:
      type: object
      properties:
        doc:
          type: string
          description: Document code to commit
        cmmt:
          type: boolean
          description: Commit flag (true to commit)
    LineItem:
      type: object
      properties:
        ref:
          type: string
          description: Line item reference
        from:
          $ref: '#/components/schemas/Location'
        to:
          $ref: '#/components/schemas/Location'
        chg:
          type: number
          format: double
          description: Charge amount
        line:
          type: integer
          description: Number of lines
        loc:
          type: integer
          description: Number of locations
        min:
          type: number
          format: double
          description: Minutes
        sale:
          type: integer
          description: Sale type (0=Wholesale, 1=Retail, 2=Consumed)
        tran:
          type: integer
          description: Transaction type
        serv:
          type: integer
          description: Service type
    CalcAdjRequest:
      type: object
      properties:
        cmpn:
          $ref: '#/components/schemas/CompanyData'
        inv:
          type: array
          items:
            $ref: '#/components/schemas/Invoice'
        adj:
          type: object
          properties:
            disc:
              type: integer
              description: Discount type
            adj:
              type: integer
              description: Adjustment method
    TaxResult:
      type: object
      properties:
        bill:
          type: boolean
          description: Billable flag
        cmpl:
          type: boolean
          description: Compliance flag
        tm:
          type: number
          format: double
          description: Taxable measure
        calc:
          type: integer
          description: Calculation type
        cat:
          type: string
          description: Tax category
        cid:
          type: integer
          description: Category ID
        name:
          type: string
          description: Tax name
        exm:
          type: number
          format: double
          description: Exempt amount
        lns:
          type: integer
          description: Lines
        min:
          type: number
          format: double
          description: Minutes
        pcd:
          type: integer
          description: PCode
        rate:
          type: number
          format: double
          description: Tax rate
        sur:
          type: boolean
          description: Surcharge flag
        tax:
          type: number
          format: double
          description: Tax amount
        lvl:
          type: integer
          description: Tax level (Federal, State, County, Local)
        tid:
          type: integer
          description: Tax type ID
    CalculationLine:
      type: object
      properties:
        lineCode:
          type: string
        itemCode:
          type: string
        numberOfItems:
          type: number
          format: double
        lineAmount:
          type: number
          format: double
        itemDescription:
          type: string
        ncmCode:
          type: string
          description: NCM (Nomenclatura Comum do Mercosul) code
        cstCode:
          type: string
          description: CST (Codigo de Situacao Tributaria) code
        cfopCode:
          type: string
          description: CFOP (Codigo Fiscal de Operacoes e Prestacoes) code
        originState:
          type: string
          description: Origin state code (UF)
        destinationState:
          type: string
          description: Destination state code (UF)
    CalculationResultLine:
      type: object
      properties:
        lineCode:
          type: string
        taxes:
          type: array
          items:
            $ref: '#/components/schemas/BrazilTaxDetail'
        totalTax:
          type: number
          format: double
    CalcTaxesResponse:
      type: object
      properties:
        inv:
          type: array
          items:
            $ref: '#/components/schemas/InvoiceResult'
    CalcTaxesRequest:
      type: object
      required:
      - cmpn
      - inv
      properties:
        cmpn:
          $ref: '#/components/schemas/CompanyData'
        inv:
          type: array
          items:
            $ref: '#/components/schemas/Invoice'
          description: Array of invoices to calculate taxes for
    CalculationResponse:
      type: object
      properties:
        header:
          type: object
          properties:
            transactionId:
              type: string
            status:
              type: string
        lines:
          type: array
          items:
            $ref: '#/components/schemas/CalculationResultLine'
    CompanyData:
      type: object
      properties:
        bscl:
          type: integer
          description: Business class (0=ILEC, 1=CLEC, etc.)
        svcl:
          type: integer
          description: Service class (0=Primary Local, 1=Primary Long Distance)
        fclt:
          type: boolean
          description: Facilities-based indicator
        frch:
          type: boolean
          description: Franchise indicator
        reg:
          type: boolean
          description: Regulated indicator
    Location:
      type: object
      properties:
        pcd:
          type: integer
          description: PCode for jurisdiction
        ctry:
          type: string
          description: Country ISO code
        st:
          type: string
          description: State abbreviation
        cty:
          type: string
          description: County name
        zip:
          type: string
          description: ZIP code
        geo:
          type: boolean
          description: Whether to geocode the address
        addr:
          type: string
          description: Street address for geocoding
    CalculationRequest:
      type: object
      required:
      - header
      - lines
      properties:
        header:
          type: object
          properties:
            transactionType:
              type: string
              enum:
              - Sale
              - Purchase
              - Return
              - Transfer
            companyLocation:
              type: string
              description: Company establishment code
            documentCode:
              type: string
            transactionDate:
              type: string
              format: date
            currency:
              type: string
              default: BRL
        lines:
          type: array
          items:
            $ref: '#/components/schemas/CalculationLine'
    BrazilTaxDetail:
      type: object
      properties:
        taxType:
          type: string
          enum:
          - ICMS
          - ICMS_ST
          - IPI
          - PIS
          - COFINS
          - ISS
          - CSLL
          - IRRF
          - INSS
          - IOF
          description: Brazilian tax type
        taxBase:
          type: number
          format: double
        taxRate:
          type: number
          format: double
        taxAmount:
          type: number
          format: double
        exemptAmount:
          type: number
          format: double
        cstCode:
          type: string
  responses:
    Unauthorized:
      description: Authentication failed
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: Invalid request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: OAuth 2.0 bearer token
externalDocs:
  description: 1099 & W-9 API Documentation
  url: https://developer.avalara.com/api-reference/avalara1099/avalara1099/