Annual Accounting
Self Assessment Tax Returns
Take the stress out of completing you tax return – so you can focus on growing your business.
Self-assessment tax filing doesn’t have to be a headache. If dealing with HMRC self-assessment fills you with dread, we’ve got you covered. Our expert tax return accountants handle everything, ensuring you pay the right tax on time—without the hassle or confusion.
What is a Self Assessment Tax Return?
Your time is precious. Let’s make tax simple
A Self Assessment Tax Return is how you tell HMRC how much tax you owe. If you’re self-employed or earn income outside of PAYE, you’ll likely need to submit one each year. But let’s be honest—tax returns can be confusing, time-consuming, and easy to put off. That’s where we come in.
Declare Your Income to HMRC
A Self Assessment Tax Return (SA100) is how sole traders, company directors, and certain individuals report their earnings, expenses, and any tax owed to HMRC.
Covers More Than Just Employment Income
It includes income from self-employment, dividends, rental properties, investments, and other sources, ensuring you pay the right amount of tax.
A Legal Requirement for Many Individuals
If you're self-employed or have untaxed income, you must file a Self Assessment Tax Return annually to stay compliant and avoid penalties.
Who is it for?
Self-employed individuals, freelancers, and sole traders; Landlords with rental income; Directors of limited companies with additional income sources; Anyone earning outside PAYE who needs help with HMRC personal assessment.
Why Choose Harland Accountants for Self Assessment Tax Returns in Cornwall?

We understand that running a business is hard enough without worrying about tax returns. At Harland Accountants, we offer:
- Expert, friendly service – No jargon, just clear advice from tax return accountants who care.
- Accuracy – We make sure your HMRC tax return is correct, so you avoid penalties.
- Local expertise – As self-assessment accountants in Cornwall, we know the ins and outs of local business needs.
- Stress-free process – We handle everything, from filing to dealing with HMRC, so you don’t have to.
- Ongoing support – We’re here all year round, not just at tax time. Meet our team of friendly experts.
Why Should You Let Us Take Care of Your Tax Return?
Stay compliant, save money, and avoid last-minute stress.
A professionally prepared self-assessment tax return offers:
- Peace of mind – No more last-minute scrambles or worrying about mistakes.
- More time for your business – We do the work, so you can focus on what matters.
- Maximised deductions – We make sure you claim every tax relief available.
- Avoid penalties – Late or incorrect filings can cost you—our experts ensure that doesn’t happen.
- Less stress, more confidence – Knowing your finances are handled correctly lets you plan for the future.

FAQs/further information/Next steps
... but now what?
If you earn outside PAYE—such as self-employed income, rental income, or dividends—you likely need to file. Not sure? Have a look on the HMRC website, or get in touch.
The deadline is 31st January each year. Don’t leave it too late—get in touch now to avoid penalties! The sooner you file your tax return, the longer you will have to pay the tax you owe, resulting in better cashflow.
HMRC issues automatic fines for late filings. Our self-assessment accountants ensure you never miss a deadline.
Yes! Travel, office costs, and even some home-working expenses can be deducted. We make sure you claim everything you’re entitled to.
Absolutely! We offer expert self-assessment services across Cornwall, both in-person and online.
Ready to Take Control of Your Business Finances?
Tax returns don’t have to be stressful. Harland Accountants is here to take the hassle off your plate, giving you confidence in your finances so you can focus on growing your business.
Services to support your business
As full-service chartered accountants, our financial management solutions save you time, eliminate confusion, and empower you with the confidence to make bold decisions.
Everyday Accounting
Manage your daily finances to ensure stability
Annual Accounting
Preparing annual accounts, tax returns, and compliance
Growth and Expansion
Strategic planning to scale your business successfully
Business Development
Identify opportunities to drive business growth
Tax Advice
Expert guidance to optimize tax obligations effectively
Reporting and Audit
Ensuring transparency and accuracy in financial records