# Tax IDs

URL: /systems/finance/tax-ids · Id: `capability:tax-ids`

> Tax IDs obtain the Company’s employer number, state tax accounts and sales tax registrations wherever it must collect or withhold.

Tax IDs obtain the [Company](/business/nouns/company)’s employer identification number, state tax accounts and sales tax or VAT registrations wherever it must collect or withhold.

## Contract
| Clause | Terms |
| --- | --- |
| Starts | [Company formation](/systems/legal-and-corporate/entity-formation), a new nexus that [Tax](/systems/tax) detects, a first VAT sale, or a first employee. |
| Thresholds | [Sales tax](/systems/legal-and-corporate/floor/nexus) registers each state whose threshold sales cross; [VAT](/systems/legal-and-corporate/floor/vat) registers once for EU and UK sales. |
| Signs | A natural person is the responsible party for the employer number ([Identity checks](/systems/legal-and-corporate/floor/identity)). An officer signs state applications. |
| While held | Inherited. The [Startup](/business/nouns/startup) collects and files under the Studio-held entity’s registrations. |
| Records | The employer number as a Company field; each registration as a [Credential](/business/nouns/credential) whose renewal is watched. |

## Verbs
| Verb | Object | Event |
| --- | --- | --- |
| [Credential.create](/business/nouns/credential/create) | [Credential](/business/nouns/credential) | `Credential.created` |

## Interfaces
- [API](/code/api/reference)
- [SDK](/code/sdk/reference)
- [CLI](/code/cli/reference)
- [MCP](/code/mcp/reference)

## Upstream
apis.tax, under an Agreement.

## Example
A stock-photo subscription passes 200 sales into one state. Tax flags the nexus, the Company is registered there within the week, and the next charge in that state carries sales tax.