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If you received Horizon Shortfall Scheme (HSS) compensation between 6 April 2022 and 5 April 2025 you can get support with your Self Assessment tax return.
Get help if you’re a tax agent or adviser who has clients with Capital Gains Tax for trusts and estates income to declare on Self Assessment tax returns.
Get help if you’re a tax agent or adviser who has clients with capital allowances for plant and machinery to declare on Self Assessment and Company Tax returns.
Use this technical documentation for individual returns if you're a software developer working with the Self Assessment Online service.
Use this guidance for support if you're a software developer working with the Self Assessment Online service.
Partnership returns technical specifications for Self Assessment Online software developers.
Use this technical documentation for trust and estate returns if you’re a software developer working with the Self Assessment online service.
An overview of announcements made by HM Revenue and Customs (HMRC) for Budget 2014.
Find out how to work out Foreign Tax Credit Relief if you have overlap profits or you're claiming overlap relief.
Find out how to complete a tax return for Lloyd's underwriters.
Returns technical specifications for Self Assessment Online software developers.
Trust and estate returns technical specifications for Self Assessment Online software developers.
Details of record keeping, enquiries, completion of Self Assessment returns, and interpretation of 'merely incidental' duties.
Use this technical documentation for partnership returns if you’re a software developer working with the Self Assessment Online service
Do not include personal or financial information like your National Insurance number or credit card details.
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