SelfAssessment.io

How to File Self Assessment Online

Filing your Self Assessment tax return online is a streamlined process designed to make tax reporting more accessible and efficient. With the digital approach, you can ensure accuracy, receive instant calculations, and get faster repayments if you've overpaid tax.

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  1. Register for Self Assessment: If you haven't filed a tax return before, you'll need to register with HMRC. Once registered, you'll receive a Unique Taxpayer Reference (UTR) and an activation code to set up your online account.
  2. Log in to your account: Use your Government Gateway user ID and password to access your Self Assessment account.
  3. Fill in your details: Provide accurate information about your income, expenses, and any reliefs or allowances you want to claim.
  4. Review your tax return: Before submitting, double-check all the details to ensure accuracy.
  5. Submit your tax return: Once you're satisfied with the information, submit your tax return online.
  6. Pay your tax bill: After submission, you'll receive a calculation of how much tax you owe. Ensure you pay by the deadline to avoid penalties.

Remember, the deadline for online tax returns is 31 January following the end of the tax year. It's advisable to file early to avoid last-minute rushes and potential website downtimes.