New! Try our Instant Tax Check tool to get a quick and easy estimate of your tax liability
logo

File a Self-Assessment Tax Return

Register your initial details with One & Only Accounts and we'll get your Tax Return under way for just £195

About you

First name
Last name
Date of birth
Email
Address
When did you move to this address

Tax details

National Insurance number Your National Insurance number is a unique personal identifier used for tax and social security purposes in the UK. It is made up of 9 characters, typically in the format ‘AB123456C’. You can find it on your payslip, P60, or letters about your benefits or tax. Please ensure the number is entered correctly.
UTR number (optional) Your Unique Taxpayer Reference (UTR) number is a 10-digit number issued by HMRC to individuals and businesses for tax purposes. You can find it on your tax returns, PAYE notices, or other correspondence from HMRC. Please ensure the number is entered correctly.

Which tax years do you wish to file for?

Please select one or more tax years. Each tax year costs £195.

 Tax Year 2025/2026
Tax Year 2024/2025
Tax Year 2023/2024
Tax Year 2022/2023
Tax Year 2021/2022

Priority service

Are you worried about missing the filing deadline or need your return in a hurry?

Choose our priority service for an additional £99 and put your mind at ease. We guarantee that your tax return is sent for your approval within 2 working days of final completion of your organiser.

Select priority service for:

Refer a friend and earn £50

Tell your friends and fellow content creators about us and receive a £50 reward!

Find out more
Refer a friend

If you know somebody who is in need of tax advice, simply refer them to us by email and if they go ahead with using our services, you will receive a £50 referral fee as a thank you from us.

Your details

Your first name
Your last name
Your email

Your friends details

Your friends first name
Your friends last name
Your friends email
Your friends phone number (optional)
Additional information Enter any additional information that may be of use.

Refer a friend terms and Conditions

  • If you wish to refer a friend, please complete the form above including your referral's name and email address/telephone number. Failure to do so may result in the referral fee being withheld.
  • If your referral successfully registers for our services and completes a tax return with us, you will be transferred the £50 referral fee within 14 days of their tax return being filed with HMRC. Your referral must enter your email address in the referral field when signing up.
  • You must be over 18 years of age.
  • The offer is valid for referrals who proceed to use One and Only Accounts only.
  • You and your referral’s personal data will be collected, stored and processed for the purposes of administering and assessing the promotion. For more information on how One and Only Accounts processes personal data, please see our privacy page.
  • One and Only Accounts reserves the right to amend, vary or cancel these terms and conditions or to withdraw this promotion at any time.
  • The promoter of this offer is One and Only Accounts, 101 Northwood Road, Whitstable, Kent CT5 2HE.