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Self Assessment Tax Returns — Expert Accountants Across Yorkshire and the UK
SAS Yorkshire Accountants provides a professional, accurate, and stress-free self assessment tax return service for sole traders, landlords, company directors, and individuals across Leeds, Bradford, West Yorkshire, and the whole of the UK. HMRC registered. Fixed fee. No hidden charges.
Expert Self Assessment Tax Return Service Across Yorkshire and the UK
Self assessment can be confusing, time consuming, and stressful - especially if you have multiple income sources or are filing for the first time. At SAS Yorkshire Accountants, our qualified accountants and tax advisers take the entire process off your hands, from start to finish.
We prepare and file your self assessment tax return accurately, on time, and in full compliance with HMRC requirements. We identify every allowable expense, relief, and deduction you are entitled to - ensuring you never pay a penny more tax than you legally have to.
Whether you are self employed in Leeds, a landlord in Bradford, a company director in Wakefield, or an individual anywhere across the UK, SAS Yorkshire Accountants delivers a personal, professional, and reliable self assessment service tailored to your exact circumstances.
KEY SELF ASSESSMENT FACTS
- Online filing deadline: 31 January 2027 for 2025/26 tax year.
- Paper filing deadline: 31 October 2026 for 2025/26 tax year.
- Automatic £100 penalty for missing the 31 January deadline.
- Additional daily penalties of £10 per day after 3 months late.
- Interest charged on unpaid tax from 1 February each year.
- Making Tax Digital for Income Tax applies from April 2026 for those with qualifying income over £50,000.
- We handle registration, preparation, submission, and all HMRC correspondence on your behalf.
- Fully compliant with HMRC Making Tax Digital requirements.
Who Needs to File a Self Assessment Tax Return?
HMRC requires certain individuals to complete a self assessment tax return each year. You may need to file if any of the following apply to your situation.
Self Employed and Sole Traders
Any individual with income from self employment or freelance work must register for and file a self assessment tax return each year regardless of profit level.
Company Directors
Directors of limited companies who receive dividends, have income not taxed through PAYE, or have other untaxed income must file a self assessment return.
Landlords and Property Owners
Individuals receiving rental income from UK or overseas residential or commercial property must declare this through self assessment.
High Earners Over £100,000
Individuals with income exceeding £100,000 per year must file a self assessment return and may be subject to the personal allowance taper.
Foreign Income and Overseas Assets
UK residents with income from employment, investments, or property overseas must declare this through the self assessment system.
Capital Gains
Individuals who have sold assets such as residential property, shares, business assets, or investments and made a gain above the annual exempt amount.
Untaxed Savings and Investment Income
Those with significant interest from savings, dividends above the dividend allowance, or other investment income not taxed at source.
HMRC Notification to File
Anyone who has received a formal notice from HMRC requiring them to complete and submit a self assessment tax return.
What Our Self Assessment Service Includes
SAS Yorkshire Accountants handles every aspect of your self assessment tax return so you can focus on what matters most to you.
HMRC Registration and Agent Authorisation
We register you for self assessment with HMRC if required and obtain full agent authorisation so we can act and communicate with HMRC directly on your behalf.
Full Income Review and Analysis
We review all your income sources for the tax year including employment income, self employment profits, rental income, dividends, savings interest, capital gains, and overseas income.
Allowances, Reliefs, and Deductions
We identify every allowable expense, relief, and tax deduction you are legally entitled to claim — from business expenses and capital allowances to pension contributions and marriage allowance.
Accurate Return Preparation
We prepare your self assessment tax return accurately and in full compliance with current HMRC rules, Making Tax Digital requirements, and UK tax legislation.
Review and Client Approval
We send you the completed return for your review and approval before filing. You always see exactly what is being submitted to HMRC and understand your full tax position.
Direct HMRC Submission
We file your return directly with HMRC online and provide you with written confirmation of submission, your tax liability, and any payments due.
Payments on Account Planning
We advise you on any payments on account due and help you plan your cash flow to avoid unexpected tax bills throughout the year.
HMRC Correspondence and Enquiries
As your authorised HMRC agent we handle all HMRC correspondence, queries, and enquiries arising from your self assessment return on your behalf.
Making Tax Digital for Income Tax — Is Your Business Ready?
From April 2026, Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) requires self-employed individuals and landlords with qualifying income over £50,000 to keep digital records and submit quarterly updates to HMRC instead of a single annual tax return.
The threshold reduces to £30,000 from April 2027 and £20,000 from April 2028. For many taxpayers, the 2025/26 self assessment return filed by 31 January 2027 will be the last traditional annual return before MTD obligations begin.
SAS Yorkshire Accountants is fully up to date with Making Tax Digital requirements. We help individuals and businesses across Yorkshire and the UK set up MTD-compatible software, establish digital record-keeping processes, and comply with quarterly reporting obligations.
From April 2026
MTD applies to self-employed individuals and landlords with qualifying income over £50,000.
From April 2027
MTD threshold reduces to £30,000 qualifying income.
From April 2028
MTD threshold further reduces to £20,000 qualifying income.
Why Choose SAS Yorkshire Accountants?
Trusted by hundreds of sole traders, landlords, directors, and individuals across Yorkshire and the UK.
Qualified Tax Advisers
Our team includes qualified accountants and tax advisers with over 20 years of experience in UK personal taxation, self assessment, and HMRC compliance.
Fixed Fee - No Surprises
We agree a clear fixed fee before we start work. No hidden charges, no hourly billing, no surprise invoices at the end of the process.
Always Filed on Time
We track all HMRC deadlines and ensure your self assessment tax return is filed well before the deadline every year without fail.
UK Wide Remote Service
Based in West Yorkshire and serving clients across Leeds, Bradford, Sheffield, Manchester, London, and the whole of the UK. Most of our service is delivered remotely.
How Our Tax Return Service Works
Getting your self assessment tax return filed with SAS Yorkshire Accountants is straightforward and stress-free.
Contact Us
Get in touch by phone or email. We discuss your circumstances, confirm what we need from you, and agree a fixed fee upfront before any work begins.
Send Us Your Documents
You send us your income details, expenses, and financial documents securely by email or via our client portal. We provide a full checklist of exactly what we need.
We Prepare Your Return
Our qualified tax advisers prepare your return accurately, claiming every allowable relief and deduction to minimise your tax liability legally and compliantly.
Review, Approve, and File
We send you the completed return for your approval. Once approved we file directly with HMRC and confirm your tax liability and any payments due in writing.
Key Self Assessment Deadlines for 2025/26
Missing an HMRC self assessment deadline results in automatic penalties. Here are the critical dates you need to know for the 2025/26 tax year.
5 April 2026
End of 2025/26 Tax Year
The 2025/26 tax year ends. All income, expenses, and financial records for this period must be collated for your self assessment return.
31 October 2026
Paper Return Deadline
Deadline for submitting your 2025/26 self assessment paper tax return to HMRC. Filing online gives you three additional months.
31 January 2027
Online Filing and Payment Deadline
Deadline for filing your 2025/26 online self assessment return, paying your tax bill, and making any first payment on account for 2026/27.
Important: HMRC automatically issues a £100 penalty if your return is filed even one day after the 31 January deadline - regardless of whether you owe any tax. Daily penalties of £10 per day apply after 3 months, rising to further penalties at 6 and 12 months. Contact SAS Yorkshire Accountants today to ensure your self assessment tax return is filed accurately and on time every year.
Self Assessment Tax Return Service Across Yorkshire and the UK
SAS Yorkshire Accountants provides expert self assessment tax return services to individuals, sole traders, landlords, and company directors across West Yorkshire and the whole of the UK. We work with clients in Leeds, Bradford, Wakefield, Huddersfield, Halifax, Harrogate, Sheffield, Manchester, London, and across England, Scotland, Wales, and Northern Ireland. Our service is delivered remotely so location is never a barrier.
Frequently Asked Questions - Self Assessment
Do I need to file a self assessment if I am employed and pay tax through PAYE?
Most employed individuals do not need to file a self assessment return as their tax is collected through PAYE. However you will need to file if you earn over £100,000, receive rental income above the property allowance, have significant savings or dividend income, claim certain reliefs, or if HMRC has sent you a notice to file.
What is the self assessment deadline for the 2025/26 tax year?
The deadline for filing your 2025/26 self assessment tax return online is 31 January 2027. The paper return deadline is 31 October 2026. Any tax owed must also be paid by 31 January 2027. HMRC issues an automatic £100 penalty for missing the online filing deadline even if no tax is owed.
What expenses can I claim on my self assessment tax return?
Allowable expenses depend on your income sources. Self employed individuals can claim business expenses including office costs, travel, equipment, professional subscriptions, and professional fees. Landlords can claim mortgage interest relief, maintenance costs, letting agent fees, insurance, and other allowable property expenses. Our tax advisers ensure every legitimate expense is identified and claimed.
What is Making Tax Digital for Income Tax and does it affect me?
Making Tax Digital for Income Tax Self Assessment requires self employed individuals and landlords with qualifying income over £50,000 to keep digital records and submit quarterly updates to HMRC from April 2026. The threshold reduces to £30,000 from April 2027. SAS Yorkshire Accountants can help you prepare for MTD and choose the right compatible software.
How do I register for self assessment with HMRC?
You must register with HMRC for self assessment by 5 October following the end of the tax year in which you first need to file. You will receive a Unique Taxpayer Reference (UTR) by post which can take up to 10 working days. SAS Yorkshire Accountants can manage the registration process on your behalf as your authorised HMRC tax agent.
Can SAS Yorkshire Accountants deal with HMRC on my behalf?
Yes. Once appointed as your tax agent we communicate directly with HMRC on your behalf. We handle all correspondence, respond to any HMRC queries, and represent you in the event of an HMRC enquiry into your self assessment return.
What documents do I need to provide for my self assessment return?
Typically you will need to provide your P60, P11D, bank statements, invoices, rental income records, dividend statements, and details of any other income or gains for the tax year. We provide you with a full document checklist when you engage our services so you know exactly what to gather.
Do I need a self assessment accountant or can I file myself?
You can file your own self assessment return if your affairs are straightforward. However an accountant adds significant value if you have multiple income sources, rental property, capital gains, overseas income, complex expenses, or if you simply want peace of mind that your return is accurate and fully compliant with HMRC requirements.
Related Accountancy And Tax Services
SAS Yorkshire Accountants provides a comprehensive range of accountancy and tax services for individuals and businesses across Yorkshire and the UK.
VAT Returns
Payroll Services
Corporation Tax
Bookkeeping Services
FREE INITIAL CONSULTATION
Ready to Get Your Tax Return Filed Accurately?
Contact SAS Yorkshire Accountants today for a free initial consultation. No obligation. No jargon. Just expert self assessment advice from Yorkshire's most trusted accountants — serving clients across the whole of the UK.
Fixed Fee • HMRC Registered • UK Wide Service
Trusted accountants and tax advisers serving individuals and businesses across Yorkshire and the whole of the UK. HMRC registered and fully compliant with Making Tax Digital.
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