Who is required to submit a Self Assessment Tax Return in the United Kingdom?
In the United Kingdom, a Self Assessment Tax Return is a system whereby individuals are required to inform HMRC of their income and tax liabilities.
If you are self-employed, receive income from rent or investments, or have foreign sources of income, you are required to file a tax return.

The Consultant legal marketplace offers a comprehensive service to assist you in preparing and submitting your Self Assessment, from registration to calculating your tax and submitting your return to HMRC.
What information is required to complete a Self Assessment Tax Return correctly?
Completing the return correctly requires gathering all information about your income for the relevant tax year. The list of required information may include:
- income from your main job or self-employment;
- income from renting property or securities;
- foreign income (including in Ukraine);
- expenses that can be taken into account to reduce tax;
- information about contributions to pension funds, donations, etc.
We will:
- check the completeness of documents and data;
- calculate the amount of tax you have to pay;
- provide written advice on potential tax benefits.
What are the risks associated with errors in Self Assessment?
A late or incorrectly completed tax return may result in:
- penalties from HMRC (for late filing or inaccurate information);
- tax audits;
- additional tax assessments with accrued penalties.
Consultant marketplace lawyers:
- guarantee the accuracy of calculations;
- submit your return by the deadline (31 January);
- advise on tax planning for future periods.
How do we help with Self Assessment Tax Returns?
Our service includes:
- registration in the Self Assessment system if you are filing for the first time;
- preparation and verification of all sections of the return;
- submission of the return to HMRC online;
- support in case of requests for additional information from the tax authorities.
We work with:
- self-employed persons (freelancers, sole traders);
- business owners;
- UK residents with foreign income.
ConclusionConsultant Legal Marketplace provides comprehensive legal support for Self Assessment, from consultations to error-free filing. Our goal is to save you time, reduce risks and ensure full compliance with HMRC requirements.