# Tax and identity numbers

Tax numbers, company numbers and identity documents.

## Topics

| Page | What it covers |
|---|---|
| [Cards and identity documents](/docs/cards-and-identity-documents.md) | Cards and identity documents are numbers a person holds: a card's brand and last four digits, its expiry, a VAT number or tax id, a passport or a driving licence. |
| [Groups with the baseline only](/docs/groups-with-the-baseline-only.md) | Many standard types are a value with a check and nothing more: an IBAN, a card number, a barcode, an NHS number. |

## Types

| Type | What it is |
|---|---|
| [`VatNumber`](/docs/types/type-vat-number.md) | A VAT registration number, with its country's code at the front: `GB980780684`. |
| [`TaxId`](/docs/types/type-tax-id.md) | A taxpayer's identification number, with the country that issued it. |
| [`UkUtr`](/docs/types/type-uk-utr.md) | A UK Unique Taxpayer Reference: ten digits. |
| [`UkCompanyNumber`](/docs/types/type-uk-company-number.md) | A UK company's number at Companies House: `00445790` or `SC123456`. |
| [`UkNationalInsuranceNumber`](/docs/types/type-uk-national-insurance-number.md) | A UK National Insurance number: `AB123456C`. |
| [`UsSsn`](/docs/types/type-us-ssn.md) | A US Social Security number: nine digits. |
| [`UsEin`](/docs/types/type-us-ein.md) | A US Employer Identification Number, for a business: nine digits. |
| [`PassportNumber`](/docs/types/type-passport-number.md) | A passport's number, with the country that issued it. |
| [`DrivingLicenceNumber`](/docs/types/type-driving-licence-number.md) | A driving licence's number, with the country that issued it. |
| [`IdentityDocument`](/docs/types/type-identity-document.md) | An identity document: its kind, the country, its number and when it expires. |
| [`IdentityDocumentKind`](/docs/types/type-identity-document-kind.md) | What kind of identity document one is: `passport`, `identity_card`, `driving_licence` or `residence_permit`. |
| [`NhsNumber`](/docs/types/type-nhs-number.md) | An NHS number, the patient identifier in England, Wales and the Isle of Man: ten digits. |