> ## Documentation Index > Fetch the complete documentation index at: https://docs.trio.com.br/llms.txt > Use this file to discover all available pages before exploring further. # Pay Tax (async) > Generate an async pay tax ## OpenAPI ````yaml v2/api-reference/openapi.json POST /v2/out/tax/async openapi: 3.0.0 info: title: Trio API v2 version: 2026-10-19.v2 servers: - url: https://api.sandbox.trio.com.br variables: {} - url: https://api.qa.trio.com.br variables: {} - url: https://api.trio.com.br variables: {} security: [] tags: [] paths: /v2/out/tax/async: parameters: - description: >- Version of the v2 contract the client is written against. Each breaking change publishes a new version. example: 2026-10-19.v2 in: header name: Trio-Version required: true schema: enum: - 2026-10-19.v2 type: string x-struct: null x-validate: null - description: >- ID of another org to act on instead of the API key's own org. The key's org must have been granted access to it, and the request is refused with 403 FORBIDDEN otherwise. When that access or the API key is read-only, only GET and HEAD requests may carry it. When the target org requires mTLS, so does the request. Leave it out to act on the key's own org. in: header name: Trio-Target-Org-Id required: false schema: format: uuid type: string x-struct: null x-validate: null post: tags: - Payments (out) - Tax summary: Pay tax async description: Generate an async pay tax operationId: TrioFoundationWeb.V2.Out.TaxController.generate_async parameters: [] requestBody: content: application/json: schema: $ref: '#/components/schemas/V2_Generate_Tax_async_create_params' description: Tax payload required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/V2_Generate_Tax_Response' description: Requested '400': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- Malformed request: a body that is not valid JSON (MALFORMED_REQUEST), or a Trio-Version header that is missing or not the current one (INVALID_TRIO_VERSION). '401': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: Missing or invalid API key credentials (INVALID_CREDENTIALS). '403': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- The API key may not do this (FORBIDDEN): for instance Trio-Target-Org-Id names an org it has no access to, or writes through a read-only access. '422': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- Invalid input (INVALID_PARAMETER, REQUIRED_PARAMETER, or the code of the rule the request breaks). A request outside the operation's schema lists the offending fields in `errors`. '503': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- A service needed to answer is unavailable (TRIO_SERVICE_UNAVAILABLE). callbacks: {} security: - authorization: [] components: schemas: V2_Generate_Tax_async_create_params: description: Body params to generate an async tax example: amount: 100 bank_account_id: 1a760495-cb95-4023-96e8-0cff5776b010 code: 4b760495-cb55-4043-95e8-0cff5776b013 description: Consectetur esse sed irure incididunt est culpa nostrud. external_id: 5b760495-cb55-4043-95e8-0cff5776b014 properties: amount: description: Amount of the tax in cents minimum: 1 type: integer x-struct: null x-validate: null bank_account_id: $ref: '#/components/schemas/UUID' code: description: Barcode or digitable_line of the tax type: string x-struct: null x-validate: null description: description: Description of the tax type: string x-struct: null x-validate: null external_id: description: External ID of the tax for reference type: string x-struct: null x-validate: null fee: description: Fee nullable: true type: integer x-struct: null x-validate: null required: - amount - bank_account_id - code title: V2 Generate_Tax_async_create_params type: object x-struct: >- Elixir.TrioFoundationWeb.Schemas.Banking.V2.Cashout.Tax.TaxSchema.GenerateAsyncRequest x-validate: null V2_Generate_Tax_Response: description: The tax bill payment requested example: data: out_document_id: 41234d60-f6a9-4c9c-8cc3-5769ce9bbea2 properties: data: properties: out_document_id: description: ID of the out document created for the payment format: uuid type: string x-struct: null x-validate: null required: - out_document_id type: object x-struct: null x-validate: null required: - data title: V2 Generate_Tax_Response type: object x-struct: >- Elixir.TrioFoundationWeb.Schemas.Banking.V2.Cashout.Tax.TaxSchema.GenerateResponse x-validate: null V2_error: example: error: error_code: INVALID_PARAMETER error_message: 'Invalid parameters: /amount: Invalid integer. Got: string' errors: - field: /amount message: 'Invalid integer. Got: string' properties: error: properties: error_code: description: >- Stable UPPER_SNAKE identifier of the error, for programs and logs. Branch on this, not on the message. type: string x-struct: null x-validate: null error_message: description: Human readable explanation of the error. type: string x-struct: null x-validate: null errors: description: >- Only on INVALID_PARAMETER for a request outside the operation's schema: one entry per offending field. items: properties: field: description: JSON pointer to the field, e.g. /amount. type: string x-struct: null x-validate: null message: description: What is wrong with it. type: string x-struct: null x-validate: null required: - field - message type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - error_code - error_message type: object x-struct: null x-validate: null required: - error title: V2 error type: object x-struct: Elixir.TrioFoundationWeb.Schemas.HTTP.V2Error x-validate: null UUID: description: Unique identifier format: uuid title: UUID type: string x-struct: null x-validate: null securitySchemes: authorization: scheme: basic type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.