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Get help if you’re a tax agent or adviser who has clients with business profits to declare on Self Assessment and Company Tax Returns.
Get help if you’re a tax agent or adviser who has clients with Income Tax losses to declare on Self Assessment tax returns.
Get help to declare on Self Assessment tax returns if you’re a tax agent or adviser who has clients with Capital Gains Tax for land and buildings.
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.
Tax treaties and related documents between the UK and Ethiopia.
Tax treaties and related documents between the UK and the Kyrgyz Republic.
Use the GAAR Advisory Panel opinion on reducing an estate's value via subscription for shares in a new company and gifting shares to an employee succession trust to help you recognise abusive tax arrangements.
Find out when you can claim additional loss relief, known as ‘agricultural relief’, if you have agricultural land included in your rental business.
An A to Z of countries Social Security agreements with contribution provisions and the corresponding Statutory Instrument numbers.
Tax treaties and related documents between the UK and Tajikistan.
July 2025 newsletter to update stakeholders on the latest news for tax-free savings.
Tax treaties and related documents between the UK and St Lucia.
Tax treaties and related documents between the UK and Solomon Islands.
Guidance for employers on the main tax issues regarding employees leaving the company or selling shares to their employer.
Tax treaties and related documents between the UK and Sierra Leone.
Use this technical documentation for individual returns if you're a software developer working with the Self Assessment online service.
Responses to points raised about the Tax Agreement between the UK and Switzerland which came into force on 1 January 2013.
Apply to support your clients with their tax responsibilities and get quicker access to HMRC services on their behalf.
HM Revenue and Customs is allowing a ‘grandfathering’ provision until 5 April 2019 for the Extra-Statutory Concession on the remuneration of sub-postmasters.
Tax treaties and related documents between the UK and Gambia.
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