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Find out when you can expect to receive a reply from HMRC to a query or request you've made.
Check if you need to declare income from selling personal possessions, goods or services online, creating online content or renting out property using digital platforms.
Find and use tools and calculators that will help you work out your tax.
Use form SA1 to register for Self Assessment for any reason other than self-employment.
Find out how to appeal an individual or partnership Self Assessment penalty. For example, either online or by post using forms SA370 or SA371.
How to get online help with Self Assessment from HMRC by using our digital assistant, community forums, YouTube videos and online tools.
Find out about tax relief available when you sell or dispose of your main home.
When and how to include overlap relief in your 2023 to 2024 tax return if you have transition profit.
Find software suppliers for tax returns, supplementary pages and attachments.
Register for Self Assessment and Class 2 National Insurance when you've joined a partnership using form SA401.
How to work out your transition profit for the 2023 to 2024 tax year if you are affected by Basis Period Reform.
Get help to make a Time to Pay arrangement if you are an individual or business who owes a debt to HMRC.
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.
Learn more about getting started with Self Assessment including registration, tax returns, tax bills and payments.
Find out about the Rent a Room Scheme if you're a trader, owner occupier or tenant.
Use the SA303 form to apply to reduce your Self Assessment payments on account.
If you're self-employed or in a partnership, use this calculator to work out your overlap relief figure for self-assessment for the 2023 to 2024 tax year.
Use the Self Assessment helpsheet (HS263) to work out tax credit relief on income that you've paid foreign tax on.
Find out how to calculate your taxable profits.
Find out about Capital gains if you sell or dispose of a shareholding.
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