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Find out how to complete a tax return for Lloyd's underwriters.
Advice on what records you need to keep for tax purposes and how long you need to keep them.
Use this helpsheet to work out Foreign Tax Credit Relief for Capital Gains and how to complete the Trust and Estate tax return.
How to claim tax relief under the Community Investment Tax Relief (CITR) scheme.
Use this technical documentation for partnership returns if you’re a software developer working with the Self Assessment online service.
Details of record keeping, enquiries, completion of Self Assessment returns, and interpretation of 'merely incidental' duties.
Use this helpsheet to understand tax rules on non-resident entertainers and sportspersons.
Find out when you can claim additional loss relief, known as ‘agricultural relief’, if you have agricultural land included in your rental business.
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 who must complete Trust and Estate Tax Returns.
Use this technical documentation for trust and estate returns if you’re a software developer working with the Self Assessment online service.
If you received Horizon Shortfall Scheme (HSS) compensation between 6 April 2022 and 5 April 2023, you can get support about your Self Assessment tax return.
Find out how to report support payments relating to self-isolation due to coronavirus (COVID-19), on your Self Assessment tax return.
Agent authorisation Self Assessment technical specifications for software developers.
Use this technical documentation for individual returns if you're a software developer working with the Self Assessment online service.
Guidance on identical returns for Self Assessment Online software developers.
Returns technical specifications for Self Assessment Online software developers.
Use this technical documentation for individual returns if you're a software developer working with the Self Assessment Online service.
Use this technical documentation for trust and estate returns if you’re a software developer working with the Self Assessment Online service.
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