Steps for Managing Self-Assessment Tax Returns: How to File Tax Returns with Confidence
Filing tax returns can feel overwhelming, especially when you are managing your own finances as a sole trader, contractor, or small business owner. However, understanding the process and breaking it down into manageable steps can make it much easier. In this post, I will guide you through the essential steps for managing your self-assessment tax returns, helping you stay organised and meet deadlines without stress.
Understanding How to File Tax Returns: The Basics
Before diving into the detailed steps, it’s important to understand what filing tax returns involves. A tax return is a form you submit to HM Revenue & Customs (HMRC) that reports your income, expenses, and any tax you owe. For many small business owners and self-employed individuals, this is done through the self-assessment system.
Here’s a simple overview of the process:
Register for self-assessment if you haven’t already.
Keep accurate records of your income and expenses throughout the year.
Complete the tax return form online or on paper.
Submit the return by the deadline.
Pay any tax owed on time to avoid penalties.
By following these steps, you can ensure your tax affairs are in order and avoid unnecessary fines.

Step 1: Register for Self-Assessment
If you are new to self-employment or have not filed a tax return before, the first step is to register with HMRC for self-assessment. This registration allows HMRC to set up your account and send you a Unique Taxpayer Reference (UTR) number, which you will need to complete your tax return.
You can register online through the HMRC website. It’s best to do this as soon as you start trading or receive income that requires self-assessment. Registration can take a few weeks, so don’t leave it until the last minute.
Tips for registration:
Have your National Insurance number handy.
Provide accurate personal details.
Keep a note of your UTR number once received.
Step 2: Keep Accurate Records Throughout the Year
One of the most important parts of managing your tax return is maintaining clear and organised records. This includes all your income, expenses, invoices, receipts, and bank statements. Good record-keeping makes completing your tax return much easier and helps you claim all allowable expenses.
Examples of records to keep:
Sales invoices and receipts.
Business expenses such as travel, office supplies, and equipment.
Bank statements showing business transactions.
Records of any other income, such as rental income.
Using accounting software or spreadsheets can simplify this process. Regularly updating your records reduces the risk of missing important information when it’s time to file.
Step 3: How much does an accountant charge for a self-assessment tax return?
Many people wonder whether to complete their tax return themselves or hire an accountant. Accountants can offer valuable expertise, especially if your finances are complex. However, it’s important to understand the typical costs involved.
Accountant fees for self-assessment tax returns vary depending on the complexity of your return and the services provided. On average, you might expect to pay between £100 and £300 for a straightforward return. More complex returns, such as those involving multiple income sources or partnerships, can cost more.
Factors influencing accountant fees:
The volume of transactions and paperwork.
Whether you need advice on tax planning.
Additional services like bookkeeping or payroll.
Hiring an accountant can save time and reduce errors, but if your tax affairs are simple, you might prefer to file yourself using HMRC’s online system.

Step 4: Complete Your Tax Return Accurately
When it’s time to complete your tax return, accuracy is key. You will need to enter details about your income, expenses, and any other relevant financial information. HMRC provides an online portal that guides you through the process step-by-step.
Practical advice for completing your return:
Use your records to fill in each section carefully.
Double-check figures to avoid mistakes.
Claim all allowable expenses to reduce your tax bill.
Include any other income, such as dividends or rental income.
Review your return before submitting.
If you’re unsure about any part of the form, HMRC offers guidance notes, or you can seek advice from a professional.
Step 5: Submit Your Tax Return and Pay Any Tax Owed
The final step is to submit your completed tax return to HMRC. The deadline for online submissions is usually 31 January following the end of the tax year. Paper returns have an earlier deadline of 31 October.
After submitting, you will receive a calculation of the tax you owe. It’s important to pay this by the deadline to avoid interest and penalties. You can pay online, by bank transfer, or other methods accepted by HMRC.
Key deadlines to remember:
Register for self-assessment by 5 October after the end of the tax year.
Paper tax returns by 31 October.
Online tax returns by 31 January.
Pay any tax owed by 31 January.
Missing these deadlines can lead to fines, so setting reminders is a good idea.
Staying Organised and Stress-Free with Your Tax Returns
Managing your tax returns doesn’t have to be a source of stress. By following these steps and staying organised throughout the year, you can file your returns confidently and on time. Whether you choose to do it yourself or work with an accountant, understanding the process is the first step to success.
Remember, keeping good records, registering early, and meeting deadlines are the pillars of smooth tax management. If you ever feel unsure, don’t hesitate to seek professional advice to ensure your finances are in good hands.
For more detailed guidance on managing your self assessment tax returns, visit the official HMRC website.

By taking control of your tax returns, you can focus more on growing your business and less on paperwork. With a clear plan and steady approach, filing your tax returns becomes a manageable part of your financial routine.



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