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Use form SA900 to file a Trust and Estate Tax Return.
Research report summarising the tracking of Self Assessment communications, measuring the effectiveness of the 2016 Self Assessment campaign
Individual returns technical specifications for Self Assessment Online software developers.
Register a new partnership for Self Assessment using form SA400.
11.5 million Self Assessment customers submitted their tax returns by the 31 January deadline
A tool to help local areas carry out a self-assessment to improve the continuity of care for people leaving prison who need alcohol and drug treatment.
Learn more about getting started with Self Assessment including registration, tax returns, tax bills and payments.
Contact HMRC for advice on how to make Self Assessment payments
Research on the testing of prototypes of the SA150, SA101, SA102 and SA103 guidance notes.
Use supplementary pages SA901L to declare Lloyd's membership income on the SA900 Trust and Estate Tax Return.
First published during the 2016 to 2019 May Conservative government
Use supplementary pages SA102M to record employment income on your SA100 tax return if you're a clergyman or a minister of religion.
Use supplementary pages SA901 to declare details of trades on the SA900 Trust and Estate Tax Return.
Use supplementary pages SA802 to complete your SA800 Partnership Tax Return if your partnership generated income from abroad.
Use this technical documentation for individual returns if you're a software developer working with the Self Assessment Online service.
This factsheet tells you about old Self Assessment penalty rules and when they apply.
Use the Self Assessment helpsheet to claim relief on dual residency, when there's a double taxation agreement between the UK and another country you live in.
Use supplementary pages SA103L to record income as an underwriting member of Lloyd’s on your SA100 Tax Return.
Don’t include personal or financial information like your National Insurance number or credit card details.
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