16/09/2026
Need a self-assessment and not sure what to do, all HMRC's links are in the link below to enable you to do it all yourself: your deadline is the 31st January 2027.
But, if you are not already registered for tax, you need to do so by the 5th October for 2025/26 tax year - register here: https://www.gov.uk/register-for-self-assessment
All Self-Assessment information:
https://hmrc.imicampaign.uk/seeemailinfull/EmailServlet?campaignkw=notrack&tid=cc-1_1788951190710877691&signature=4ED263B256AB25A1CE94D26670753B67