Terms of Service

Taxxona is an AI-assisted tax return preparation service for UK Self Assessment. We use artificial intelligence to guide you through the information-gathering process and to assist with calculations. Returns on our review service are additionally checked and approved by a qualified accountant before filing.

Taxxona is a trading name of Taxly Technologies Limited, registered in England and Wales under company number 17210367, whose registered office is at 167-169 Great Portland Street, 5th Floor, London, W1W 5PF.

Returns on our review service are checked by a contracted, appropriately qualified reviewer before filing. Where your return is complex or outside the scope of our review service, we may refer you to a specialist tax adviser rather than file a return we are not confident in.

When you use Taxxona, you agree to:

• Provide accurate and complete information about your income, expenses, and circumstances.
• Retain your original tax records for the period required by HMRC, typically five years after the 31 January submission deadline (six years in total).
• Notify us promptly of any errors you discover, or any changes to the information you have provided.
• You remain legally responsible for the accuracy of your tax return. While we review your return professionally, the legal obligation to submit a correct return rests with you as the taxpayer.

You file under your own HMRC authority. You connect your own Government Gateway account to Taxxona, and your return is submitted to HMRC under that authority, by you. We do not file it under any agent authorisation of our own.

Before anything is sent to HMRC, you sign a declaration confirming that the return is correct and complete. We submit the figures you signed for and nothing else. If those figures change after you have signed, you will be asked to review and sign again.

On our review service, a reviewer checks and approves your return before it can be submitted. That approval does not replace your declaration: you still sign, and you still file.

You may withdraw your HMRC connection at any time by contacting us. Withdrawal will not affect a return that has already been submitted.

We do not currently offer agent filing, meaning submission by us on your behalf under our own HMRC agent authorisation. If we offer it in future it will require separate authorisation from you, and we will tell you before anything changes.

Our service uses artificial intelligence (powered by Anthropic Claude) to assist with the intake process, data extraction, and tax calculations.

The AI does not make final decisions about your tax position. You review and approve your return before it is filed, and on our review service a qualified accountant checks the AI-generated outputs as well.

By using the service, you consent to your data being processed by our AI systems for the purpose of preparing your tax return.

Prices shown are indicative. The exact fee for your return is confirmed at checkout before you pay.

Payment is taken before your return is submitted to HMRC. If we are unable to complete your return for any reason, you will receive a full refund.

We will exercise reasonable care and skill in preparing your tax return.

• We are not liable for any losses, penalties, or interest arising from inaccurate or incomplete information that you provide to us.
• Our total liability to you in respect of any claim is limited to the fee you paid for the service.
• We do not provide investment advice, legal advice, or financial planning services. Our service is limited to the preparation and submission of your Self Assessment tax return.

All content, design, software, and technology used in the Taxxona service is owned by or licensed to Taxly Technologies Limited and is protected by intellectual property laws. You may not copy, modify, or distribute any part of our service without our written permission.

Either party may terminate this agreement at any time by giving written notice.

If you terminate after we have substantially begun work on your return, no refund will be due. If we terminate, or if work has not substantially begun, you will receive a full refund of any fees paid.

These terms are governed by the laws of England and Wales. The courts of England and Wales have exclusive jurisdiction over any dispute arising from or in connection with these terms or your use of the service.

We may update these terms from time to time. If we make material changes, we will notify you by email. Your continued use of the service after changes are published constitutes acceptance of the updated terms.