Submit Self Assessment Tax Return Online

Navigating self-assessment tax returns can be daunting, especially with evolving HMRC requirements. Affotax streamlines the process with our UK expert Self Assessment Online Submission service, allowing you to submit your tax returns accurately, promptly, and stress-free. Our dedicated tax professionals are here to ensure your submission is precise, compliant, and meets all deadlines, allowing you to focus on what matters most to you.

Why Submit Your Self Assessment Online?

The online submission of self-assessment tax returns offers a secure, efficient way to meet your tax obligations, saving you from the complexities of manual filing. Submitting a self-assessment tax return online minimises the chance of errors and allows quicker processing. With Affotax, you can leverage our user-friendly online tools and expert guidance to ensure a seamless process from start to finish.


Our Self Assessment Online Submission service covers everything from preparing your SA100 form to submitting it electronically on HMRC's platform, handling every aspect with care and compliance. Whether you are self-employed, a freelancer, or an individual with additional income sources, we ensure a straightforward, fully compliant submission every time.

Step-by-Step Submission


  1. Gather Relevant Documents To ensure accurate data entry, compile essential documents like income statements, expense records, bank interest details, and pension contributions. Our checklist can help you organise these documents efficiently.
  2. Complete Your SA100 Tax Form Our team assists you in filling out the SA100 tax form accurately, capturing all relevant income and allowable expenses. We’ll advise on any tax reliefs and deductions applicable to maximise your returns and minimise liabilities.
  3. Online Submission of Self Assessment Tax Once your form is complete and reviewed, we submit your self-assessment tax return online directly to HMRC. By handling this process online, we ensure quicker processing and verification.
  4. Receive Confirmation and Stay Updated After submission, we provide you with confirmation and follow up with any updates from HMRC. Should there be any further actions required, Affotax remains by your side to address them promptly.

Who Needs to Submit a UK Self Assessment Tax Return?

Individuals who typically need to submit a self-assessment tax return include:

  • Self-employed individuals and sole traders
  • Those earning rental income or income from investments
  • Individuals with foreign income or untaxed income from side jobs
  • Those who wish to claim tax reliefs or adjustments for allowable expenses

Even if you’re unsure about your need to submit a self-assessment tax return, our team at Affotax can help you determine eligibility.


Avoid Penalties

Missing the January 31st deadline for online submissions can result in penalties, starting with an immediate £100 fine for late submissions. Penalties increase with further delays. By entrusting Affotax with your self-assessment submission, you gain peace of mind that deadlines are met, and penalties are avoided.

Submit Your UK Self Assessment Tax Return

Self-assessment submission should be straightforward, reliable, and accessible. With Affotax, you gain a dedicated partner to handle your self-assessment tax return, ensuring accuracy and compliance every step of the way. Let us simplify your self-assessment submission so you can focus on what you do best.

Contact Affotax

Ready to submit your self-assessment tax return with ease and confidence? Reach out to Affotax today, and let our professionals guide you through every step of the submission process. With our comprehensive self-assessment service, you can trust that your tax obligations are managed efficiently, timely, and accurately.

Benefits of Using Affotax’s Online Submission Service

  • 📊 Ease of Use

    Forget the complexities of tax jargon; our system simplifies every step, guiding you through what you need to submit and when.

  • 🔒 Security

    With our secure submission process, your data remains confidential and fully protected.

  • ⏱️ Timeliness

    Our professionals ensure timely submissions, preventing potential fines or late fees.

  • ✔️Accuracy

    We meticulously check your information before submission, ensuring that all details align with HMRC's guidelines.

Benefits of Using Affotax’s Online Submission Service

  • 📊 Ease of Use

    Forget the complexities of tax jargon; our system simplifies every step, guiding you through what you need to submit and when.

  • 🔒 Security

    With our secure submission process, your data remains confidential and fully protected.

  • ⏱️ Timeliness

    Our professionals ensure timely submissions, preventing potential fines or late fees.

  • ✔️Accuracy

    We meticulously check your information before submission, ensuring that all details align with HMRC's guidelines.

Simplify your Tax Filing with Affotax — Let's Talk Today!

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Frequently Asked Questions

If you have any personalised guidance or additional inquiries about our service, please don't hesitate to contact us.

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