openapi: 3.1.0
info:
  title: Avalara 1099 & W-9 1099 Forms Filing Calendar 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: Filing Calendar
  description: Manage VAT filing obligations and calendars
paths:
  /filing-calendars:
    get:
      operationId: listFilingCalendars
      summary: Avalara List Filing Calendar Obligations
      description: Retrieves the filing calendar showing due dates and obligations for each jurisdiction and filing period.
      tags:
      - Filing Calendar
      parameters:
      - name: countryCode
        in: query
        schema:
          type: string
      responses:
        '200':
          description: Filing calendar entries
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/FilingCalendarEntry'
components:
  schemas:
    FilingCalendarEntry:
      type: object
      properties:
        countryCode:
          type: string
        returnType:
          type: string
        filingFrequency:
          type: string
        periodStart:
          type: string
          format: date
        periodEnd:
          type: string
          format: date
        dueDate:
          type: string
          format: date
        status:
          type: string
          enum:
          - Upcoming
          - Due
          - Overdue
          - Filed
  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/