---
title: "Get back filing request options"
method: GET
path: "/v1/filings/back-filing-request/options"
tags: ["Filings"]
---

# Get back filing request options

`GET /v1/filings/back-filing-request/options`

## Request

- Base URL: `https://api.trykintsugi.com`
- URL: `https://api.trykintsugi.com/v1/filings/back-filing-request/options`
- Auth: API key in header `X-API-KEY`

Eligible US registrations and periods for a customer back-filing request.

## Headers

- `x-organization-id` string, nullable, required: The unique identifier for the organization making the request

## Response `200`

Successful Response

- BackFilingRequestOptionsResponse
  - `registrations` BackFilingRequestRegistrationOption[], required
    - `registration_id` string, required
    - `state_code` string, required
    - `remittance_tag` string, nullable, required
    - `periods` BackFilingRequestPeriod[], required
      - `start_date` string, date, required
      - `end_date` string, date, required
      - `label` string, required
  - `help_article_url` string, nullable, required
  - `help_article_label` string, required

## Other responses

- `422`: Validation Error

## Changes

- **2026-10-06** `a70ee62866c0`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/trykintsugi/apis/tax-platform/changes/v1/filings/back-filing-request/options/get.md)

---

[API](https://skmtc.dev/trykintsugi/apis/tax-platform.md) - [All operations](https://skmtc.dev/trykintsugi/apis/tax-platform/llms.txt) - [OpenAPI document](https://skmtc.dev/trykintsugi/apis/tax-platform/revisions/00512519f0d4?raw)