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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.
Use this technical documentation for partnership 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.
Find out how to report support payments relating to self-isolation due to coronavirus (COVID-19), on your Self Assessment tax return.
Benefits and tips on how to get your tax return done early.
Get help if you’re a tax agent or adviser who has clients with Capital Gains Tax for shares to declare on Self Assessment tax returns.
Find out how to work out Foreign Tax Credit Relief if you have overlap profits or you're claiming overlap relief.
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.
Use this helpsheet to work out Foreign Tax Credit Relief for Capital Gains and how to complete the Trust and Estate tax return.
Find out when you can claim additional loss relief, known as ‘agricultural relief’, if you have agricultural land included in your rental business.
This factsheet tells you about old Self Assessment penalty rules and when they apply.
Check the availability and any issues affecting the Self Assessment payment plan service.
Details of record keeping, enquiries, completion of Self Assessment returns, and interpretation of 'merely incidental' duties.
Find out how to complete a tax return for Lloyd's underwriters.
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 helpsheet to understand tax rules on non-resident entertainers and sportspersons.
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