All official sources
VERIFIED OFFICIAL SOURCE
Continue toOfficial websiteGOV.UK - Self Assessment deadlines
gov.uk
Official source URLhttps://www.gov.uk/self-assessment-tax-returns/deadlines
CONNECTED GUIDES
2Procedures using this source
These Helpydo guides reference this official page as a verification source.
GBUnited Kingdom
How to Register as a Sole Trader When You Start Working for Yourself
Register as a UK sole trader through Self Assessment, check the £1,000 trading-income rule, deadlines, records, tax, National Insurance and VAT responsibilities.
GBUnited Kingdom
How to File Your 2025 to 2026 Self Assessment Tax Return Online With HMRC
File your UK Self Assessment tax return online with HMRC for the 2025 to 2026 tax year, including registration, records, deadlines, payment and late filing penalties.
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Rules, fees, forms and processing routes can change. Helpydo connects procedural guidance to the responsible authority so you can verify time-sensitive details before acting.