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Find out how to ask for authorisation, manage your client's account and how to send returns as an agent.
Tax treaties and related documents between the UK and USA.
Find out about the Rent a Room Scheme if you're a trader, owner occupier or tenant.
Use this form to work out interest and penalties for tax years ending 5 April 2004 to 5 April 2023.
Find examples to help landlords avoid common mistakes when working out and reporting income and profit from renting out a property.
Learn more about getting started with Self Assessment including registration, tax returns, tax bills and payments.
How to claim a refund in the current tax year if you've stopped working, have flexibly accessed and emptied your pension pot, and have a P45 from your pension provider.
How to claim a refund on tax and personal allowances on UK income if you're not resident in the UK on form R43.
Before you sail to or from the UK, submit your voyage plan with details of your vessel, people and goods on board. Find out how to change or cancel your report.
Apply for a healthcare entitlement certificate (S1) if you’re paying UK National Insurance as a worker while resident in an EU country, Iceland, Liechtenstein, Norway or Switzerland.
Claim the residence nil rate band (RNRB) against the estate of someone who has died using form IHT435.
How to report profit on your Self Assessment tax return from 2023 to 2024 if your accounting year does not end on or between 31 March to 5 April.
Find help about filling in the Capital Gains Tax summary pages of your tax return when someone dies.
Find out the rules on paying tax on foreign income or gains and about residency, domicile and the remittance basis from 6 April 2013.
Apply for a certificate to confirm you only pay UK National Insurance contributions when you're working in 2 or more countries in the UK, EU, Gibraltar, Iceland, Liechtenstein, Norway or Switzerland.
Find out the rules for transferring unused tax-free residence allowance to a surviving spouse or civil partner.
How to work out your transition profit for the 2023 to 2024 tax year if you are affected by the new tax year basis (Basis Period Reform).
Find out how GOV.UK One Login will apply to you and when you can expect to start using it.
Find out how to calculate your taxable profits.
Learn more about getting started as an employer or running a small business including registration, payroll, tax returns, tax bills and payments.
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