Explain a tax decision

GET /api/v1/tax/quotes/tq_01m4tx5nj8emwbyf7y9vcf47xq/explanation
Authorization: Bearer or_test_…

{
  "object": "tax_explanation",
  "quoteId": "tq_01m4tx5nj8emwbyf7y9vcf47xq",
  "livemode": false,
  "decision": "charge",
  "summary": "Tax is charged: EUR 25.00 on a net EUR 100.00 (EUR 125.00 in total), under Croatia, domestic VAT (HR_DOMESTIC).",
  "steps": [
    {
      "step": 1,
      "name": "customer",
      "title": "Who the customer is",
      "text": "The customer gave no tax ID, so the sale is treated as a sale to a consumer (business-to-consumer)."
    },
    {
      "step": 2,
      "name": "location",
      "title": "Where the customer is",
      "text": "The customer is located in DE: all the location evidence agrees (2 evidence items: billing address, IP address)."
    },
    {
      "step": 3,
      "name": "regime",
      "title": "Which tax regime applies",
      "text": "The regime for this sale is One-Stop Shop, Union scheme (EU_OSS_UNION), chosen from where the seller is established, where the customer is and the customer's type."
    },
    {
      "step": 5,
      "name": "place_of_supply",
      "title": "Where the sale is taxed",
      "text": "Every line is taxed where the customer is."
    },
    {
      "step": 6,
      "name": "registration",
      "title": "What the registration state allows",
      "text": "The entity's sales under the regime are below its registration threshold, so the seller's home-country rules apply instead. The tax is charged under Croatia, domestic VAT (HR_DOMESTIC) instead of One-Stop Shop, Union scheme (EU_OSS_UNION)."
    },
    {
      "step": 7,
      "name": "rate",
      "title": "Which rate applies",
      "text": "Line 1: the standard rate of 25% in HR for the tax category `saas`. The rates are the ones valid at the tax point."
    },
    {
      "step": 8,
      "name": "amounts",
      "title": "How the amounts were computed",
      "text": "Prices exclude tax, so the tax is added to the net amount: net EUR 100.00, tax EUR 25.00, gross EUR 125.00."
    }
  ],
  "lines": [
    {
      "index": 0,
      "id": "pro_monthly",
      "text": "Line 1 (tax category `saas`): tax is charged; net EUR 100.00, tax EUR 25.00, gross EUR 125.00."
    }
  ],
  "notes": [],
  "ruleVersions": {
    "rateIds": ["kn_01m4tx5nj8emwbyf7y9vcf47xs"],
    "regimeId": "EU_OSS_UNION",
    "regimeVersion": "10fc4013168eb593",
    "knowledgeCommit": "f101d33bdd0b1b9257b6b78826836646a30e4fa5"
  }
}

GET /api/v1/tax/quotes/tq_01m4tx5nj8emwbyf7y9vcf47xr/explanation
Authorization: Bearer or_test_…

{
  "object": "tax_explanation",
  "quoteId": "tq_01m4tx5nj8emwbyf7y9vcf47xr",
  "livemode": false,
  "decision": "reverse_charge",
  "summary": "No tax is charged under One-Stop Shop, Union scheme (EU_OSS_UNION): the business customer accounts for it (reverse charge).",
  "steps": [
    {
      "step": 1,
      "name": "customer",
      "title": "Who the customer is",
      "text": "The customer is a business: its tax ID from AT was checked and is valid, so the sale is business-to-business."
    },
    {
      "step": 2,
      "name": "location",
      "title": "Where the customer is",
      "text": "The customer is located in AT: it is the country of the business's validated tax ID."
    },
    {
      "step": 3,
      "name": "regime",
      "title": "Which tax regime applies",
      "text": "The regime for this sale is One-Stop Shop, Union scheme (EU_OSS_UNION), chosen from where the seller is established, where the customer is and the customer's type."
    },
    {
      "step": 5,
      "name": "place_of_supply",
      "title": "Where the sale is taxed",
      "text": "Every line is taxed where the customer is."
    },
    {
      "step": 6,
      "name": "registration",
      "title": "What the registration state allows",
      "text": "The customer is a business in another country: the customer accounts for the tax (reverse charge), and the entity needs no registration for it."
    },
    {
      "step": 7,
      "name": "rate",
      "title": "Which rate applies",
      "text": "No rate was needed: no line is charged tax."
    },
    {
      "step": 8,
      "name": "amounts",
      "title": "How the amounts were computed",
      "text": "Prices exclude tax, so the tax is added to the net amount: net EUR 100.00, tax EUR 0.00, gross EUR 100.00."
    }
  ],
  "lines": [
    {
      "index": 0,
      "id": "1",
      "text": "Line 1 (tax category `saas`): no tax is charged: the business customer accounts for it (reverse charge); net EUR 100.00, tax EUR 0.00, gross EUR 100.00."
    }
  ],
  "notes": ["The invoice must say that the customer accounts for the VAT (reverse charge)."],
  "ruleVersions": {
    "rateIds": [],
    "regimeId": "EU_OSS_UNION",
    "regimeVersion": "10fc4013168eb593",
    "knowledgeCommit": "f101d33bdd0b1b9257b6b78826836646a30e4fa5"
  }
}