Self-Assessment Tax Return Guide: Essential Requirements

Self-Assessment Guide

Filing your self-assessment tax return might seem daunting, but with the right preparation, it can be a manageable process. To ensure a smooth experience and accurate reporting, here’s a comprehensive guide outlining the essentials you’ll need to prepare your UK tax return for 2023.

Personal Details

Start by gathering your personal information. This includes your National Insurance number, full name, address, date of birth, and, most importantly, your Unique Tax Reference number or UTR. Ensuring these details are accurate and up-to-date is crucial for your tax return.

Income Details

Collecting records of all your income sources is a vital step. This involves various documents:

  • Employment Income – Gather your P60 forms provided by your employer(s), detailing your income and tax deductions.
  • Self-Employment Income – Keep a record of your sales, expenses, receipts, and invoices related to your business.
  • Rental Income – Document the income received from any rental properties and associated expenses.
  • Pension Income – Collect statements from your pension providers displaying the payments received during the tax year.
  • Savings and Investments – Retrieve statements from banks, building societies, or investment firms showcasing your savings and investments.

Expense Documentation

Accurate reporting of allowable expenses is essential. Keep receipts and records of all relevant expenses related to your income sources. This may include travel costs, office supplies, professional fees, or any other expenses directly linked to earning your income.

Tax Relief Papers

If you’re eligible for tax relief or deductions, ensure you have the necessary documentation to support your claims. This might involve proof of charitable donations, pension contributions, or other eligible expenses.

Capital Gains and Losses

For any assets sold or disposed of during the tax year, gather details of the transactions and calculate any gains or losses incurred.

Read more on Capital Gains Here.

Tax Statements/Documents

Retain all tax-related documents, including P45s, P11Ds, or any other statements received from HMRC or financial institutions. These papers are crucial for accurate reporting and ensuring compliance.

Read More about P45, P60 & P11D forms Here.

Benefits and Allowances

Document any state benefits or allowances you received throughout the tax year, such as Child Benefit or Jobseeker’s Allowance.

Marriage Allowance or Child Benefit Details

Include information regarding any claimed Marriage Allowance or received Child Benefit, if applicable.

Previous Year's Tax Return

Having your previous year’s tax return at hand can provide valuable insights and assist in maintaining consistency in your reporting.

Digital Tools and Software

Consider using digital tools or HMRC’s online services to streamline the filing process. Accredited tax software can simplify the data entry and submission of your tax return.


Preparation is key when it comes to your self-assessment tax return. By organizing and gathering these essential documents and details before starting the process, you’ll be well-equipped to complete your tax return accurately and on time for the tax year ending April 5, 2023.

Take the time to compile these records, stay informed about any changes in tax regulations, and consider seeking professional advice if needed. With thorough preparation, navigating your UK tax return becomes more manageable, ensuring compliance and peace of mind.

If you would like a low-cost full tax return service for £99.00 excluding VAT please contact us at Tel: 0161-457-2215 or drop us an email at

Article written by Martin Craighan for

Date: 1st December 2023.

Read More on Self-Assessment Here.

Write a comment

Your email address will not be published. Required fields are marked *