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Use this form to work out Income Tax, interest, penalties and Class 4 National Insurance contributions for tax years ending 5 April 2010 to 5 April 2024.
How to update your details online if the estimate of your income for the year is going to be more or less than expected.
Use form R38 to claim an Income Tax refund by post or nominate someone else to receive the refund on your behalf.
Learn more about Making Tax Digital for Income Tax if you're an agent, sole trader or landlord.
Find out how to tell HMRC that a chargeable event has occurred, and Inheritance Tax is due on a gift or trust.
Find information on completing the UK property and other property sections of your Self Assessment tax return.
Tax treaties and related documents between the UK and Spain.
Tax treaties and related documents between the UK and France.
Use this guide to help you complete the pension savings tax charges and taxable lump sums from overseas pension schemes.
Use this calculator to work out the adjustment for your Self Assessment tax return for disposals of assets on or after 30 October 2024 where the rates changed.
Check if an estate can get the residence nil rate band (RNRB) when someone downsizes, gifts or sells their home before they die.
Use the online service to register a deceased person's estate if you’re an executor, administrator or personal representative.
Use these rates and thresholds when you operate your payroll or provide expenses and benefits to your employees.
Find out the rules for transferring unused tax-free residence allowance to a surviving spouse or civil partner.
How to claim UK tax relief on your UK income under double taxation agreements if you’re a non-resident.
Find out how gifts are treated for Capital Gains Tax.
Find help about filling in the Capital Gains Tax summary pages of your tax return when someone dies.
Find information on completing the employment section of your Self Assessment tax return.
Use the Self Assessment helpsheet (HS325) to work out your other taxable income and include this in your tax return.
If you're an employee working at sea outside of the UK check if you can claim tax relief on your earnings.
Do not include personal or financial information like your National Insurance number or credit card details.
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