# tax.questions.answer

Answer one year-end question of a corporate tax year: { period, question, answer: yes|no|not_sure, choice?, choice2?, text?, amount?, note?, evidenceIds?, snapshotHash, idempotencyKey }. tax.questions.list names the follow-up fields each answer needs; amounts are in dollars ("1250.00") and files are evidence ids, from tax.sources.confirm or an original already kept with a record. Oatmilk checks the answer as the questions step does, words it the same way and saves it as the question's tax checks at their current revisions, exactly like tax.checks.update. not_sure leaves the question open for the accountant. Returns the saved checks. A changed snapshotHash means records changed: read the questions again. Nothing is filed.

`POST /api/v1/accounting/tax.questions.answer`

Permissions: `accounting:read`, `accounting:write` · Roles: admin, finance · Idempotency key required

MCP tool: `accounting_tax_questions_answer`

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `period` | object | Yes | The period to cover. No other fields. |
| `period.from` | string | Yes | The first date to include, as YYYY-MM-DD. |
| `period.to` | string | Yes | The last date to include, as YYYY-MM-DD. |
| `period.kind` | enum | Yes | Which kind of record or job this is. One of: `corporate`, `gst_hst`. |
| `question` | enum | Yes | One of: `accounts`, `first_year`, `capital_assets`, `owner_money`, `payroll`, `contractors`, `instalments`, `unusual`. |
| `answer` | enum | Yes | One of: `yes`, `no`, `not_sure`. |
| `choice` | string |  | at most 40 characters. |
| `choice2` | string |  | at most 40 characters. |
| `text` | string |  | at most 100 characters. |
| `amount` | string or number |  |  |
| `note` | string |  | A short note, kept with the record. at most 2000 characters. |
| `evidenceIds` | array of strings (ID) |  | A list of record IDs. at most 20 items. |
| `snapshotHash` | string | Yes | SHA-256 hash as 64 lowercase hex characters. |
| `idempotencyKey` | string | Yes | Any unique text you generate once per intended change, so a retried request only happens once. Send it as the Idempotency-Key header instead if you prefer; if you send both they must match. 8–200 characters. |

## Example request

```bash
curl https://app.getoatmilk.com/api/v1/accounting/tax.questions.answer \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "period": {
    "from": "2026-09-01",
    "to": "2026-09-30",
    "kind": "corporate"
  },
  "question": "accounts",
  "answer": "yes",
  "snapshotHash": "9f2b5c1d7e3a4b6c8d0e2f4a6b8c0d2e4f6a8b0c2d4e6f8a0b2c4d6e8f0a2b4c"
}'
```

Reference page: https://app.getoatmilk.com/docs/api/tax.questions.answer