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Use the SA303 form to apply to reduce your Self Assessment payments on account.
Call, chat or write to HMRC about Self Assessment or PAYE if you’re authorised to act as an agent or tax adviser for your client.
Find out about tax reliefs and allowances available from HMRC if you run a business, employ people or are self-employed.
Learn more about VAT including accounting schemes, VAT Returns and keeping records.
Use the Self Assessment helpsheet (HS325) to work out your other taxable income and include this in your tax return.
Learn more about getting started as an employer or running a small business including registration, payroll, tax returns, tax bills and payments.
How to claim UK tax relief on your UK income under double taxation agreements if you’re a non-resident.
Check the availability and any issues affecting the Self Assessment online service.
Find out how to report trading losses in your Self Assessment tax return.
How to make a negligible value claim on disposal of shares you have subscribed for in qualifying trading companies.
Learn more about your responsibilities if you're running a small business including registration, tax returns, record keeping, tax bills and payments.
Use Self Assessment software to help populate your Self Assessment tax return.
How to complete the Capital Gains Tax summary of your tax return for share and security schemes.
Find out if you qualify for the Seafarers' Earnings Deduction.
Use this guide to help you complete the pension savings tax charges and taxable lump sums from overseas pension schemes.
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 Self Assessment helpsheet HS252 to help you fill in the capital allowances boxes on your tax return.
Use this guide to help you fill in the UK property pages of your Self Assessment tax return.
If you complete a Self Assessment tax return, you must use it to tell HMRC about your student or postgraduate loan deductions.
Use the online service to register a deceased person's estate if you’re an executor, administrator or personal representative.
Don’t include personal or financial information like your National Insurance number or credit card details.
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