HMRC UK Tax Authority

HMRC Self Assessment API

The HMRC Self Assessment APIs enable software to submit and manage self assessment tax returns, income sources, and tax calculations for individuals and sole traders under Making Tax Digital for Income Tax.

GitHub

Documentation

📖
Documentation
https://developer.service.hmrc.gov.uk/api-documentation/docs/api
📖
Authentication
https://developer.service.hmrc.gov.uk/api-documentation/docs/authorisation

API entry from apis.yml

apis.yml Raw ↑ 
aid: hmrc:hmrc-self-assessment-api
name: HMRC Self Assessment API
description: The HMRC Self Assessment APIs enable software to submit and manage self assessment tax returns,
  income sources, and tax calculations for individuals and sole traders under Making Tax Digital for Income
  Tax.
humanURL: https://developer.service.hmrc.gov.uk/api-documentation/docs/api
baseURL: https://api.service.hmrc.gov.uk
image: https://raw.githubusercontent.com/api-evangelist/hmrc/refs/heads/main/image.png
tags:
- Government
- Income Tax
- REST
- Self Assessment
- Tax
- UK
properties:
- type: Documentation
  url: https://developer.service.hmrc.gov.uk/api-documentation/docs/api
- type: Authentication
  url: https://developer.service.hmrc.gov.uk/api-documentation/docs/authorisation