How to Submit Self-Assessment Tax Return

  • today 04 Feb 2021
  • timer 7 minutes read
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In case you are a higher rate taxpayer or have income from some other sources, you will probably have to file a Self Assessment Tax Return.

But unsure how to pay Self Assessment tax?

HMRC recently waived the penalty for late submission of the tax return. Now you can file your 2019/20 tax return by 28 February 2021, and no penalty will be charged. However, interest is payable on the unpaid tax liability. This guide is for you if you haven't filed your tax return yet and are not sure how to do this.

This Blog Post Is Divided Into Following Sections

What Is Self-Assessment Tax Return?

The main purpose of Self Assessment is to declare all income for a tax year to HMRC to make sure that the right amount of income tax is paid.

In simple words, a Self Assessment is HMRC's way to find out how much Income Tax and National Insurance an individual needs to pay on any income which is not taxed at source.

Generally, employees have their income tax automatically deducted from their employment income through PAYE scheme.

This does not happen for self-employed, or for other types of income, like pensions or income from investments and savings, which is where the Self Assessment comes in.

Therefore it's very important to be aware of working out your tax liability so that money can be put to the side to pay HMRC.

Visit our blog tips for starting year-end tax planning to make your tax planning simple.

Who Needs To Complete The Self Assessment Tax Return?

Individuals who're required to file a Self Assessment tax return include:

  • Those who are self-employed or sole traders
  • An administrator of a deceased's estate
  • You are a company director, and your income is not taxed under PAYE
  • A minister of religion
  • A trustee
  • A partner in a business partnership

Also, even if you're on PAYE, you may need to complete Self Assessment if:

  • You've additional income from property, investments and other sources
  • You have taxable foreign income
  • You have an annual income of over £100,000
  • You or your partner are receiving child benefit, and your income is over £50,000
  • Your claims for expenses are over £2,500
  • You have capital gains

There may also be other reasons as to why you need to send a Self Assessment tax return.

Registering For Self Assessment

Before you complete the first tax return, you have to register for Self Assessment.

Once you have registered, HMRC will set up the right records for you that will ensure you pay the right amount of tax and National Insurance.

When an individual identifies the reason for filing the Self Assessment Tax Return, they must inform this to HMRC.

You can do this by completing either the online HMRC form or by downloading and posting a completed SA1 form to HMRC.

After the registration for self-assessment, HMRC will send you a Unique Taxpayer Reference (UTR) number.

With the use of UTR number, you can be able to set up your government gateway account.

Once your government gateway account is up and running, you'll be able to log in and submit your tax return.

How To File Tax Return?

Wait! Before you sit down to do your tax return, just make sure you've everything you need on hand. This way, the process will be more straightforward.

Let me tell you what you will need:

  • Your 10-digit UTR number + National Insurance Number
  • Details of any self-employment business expenses
  • Details of income from self-employment including bank statements, dividends and interests on shares
  • Details of any pension or charitable contributions for tax relief

If you earn an income through employment, you will also need:

  • P60 from your employer showing your income & the tax you have already paid
  • P11D or P9D showing any benefits or expenses you received
  • P45 if you've left your job during the tax year

As long as you've accurate records of your income and expenses, filling in the tax return will be no more headache than completing any regular expense form.

Now all you've to do is enter all the information, and the system is going to take care of the rest.

The tax self-assessment tax return has a main section (SA100) and supplementary sections for income from other sources that you have not paid tax on.

The SA100 Income Section

This section contains income from sources other than self-employment or employment, along with any pension or charitable contributions you have made.

This includes:

  • Pension, annuities & state benefits 

This covers details on the total and gross amounts of State Pension, the gross amount of other pension lump sums and details on benefits, such as Incapacity Benefit, Jobseeker's Allowance, Industrial Death Benefit, Bereavement Allowance etc.

  • Blind Person's Allowance 

You must note whether or not you are claiming this.

  • Student Loan Repayments

You must note that whether or not you are repaying a student loan and details of deductions made by the employer.  

  • A Marriage Allowance 

In case your income for the tax year was less than a Personal Allowance, you can be able to transfer the remaining allowance to your spouse.

  • High-income Child Benefit

If you earn more than £50,000 and receive Child Benefit, you will need to complete this section.

  • Charitable donations 

Details of all Gift Aid donations.

  • Pension contributions 

Details about all payments made into a registered pension scheme or annuity contract where contributions were made after-tax.

Supplementary Tax Return Pages

In case you are self-employed, have capital gains to declare or have income from property, you will need to complete the important supplementary pages that are as below.

  • Self-employed - SA103 form
  • UK property - SA105 form
  • Capital Gains - SA108 form

Each of these forms is divided into two sections: income and expenses.

For Self-Employed

Your income is everything you have earned through self-employment during the tax year, before expenses.

If you have other incomes, you will have to enter the one you earn the most from as the main income.

For instance, if you worked as the freelance web designer and earned £20,000 through selling your services, and earned £8,000 through your side hustle, you have listed your web designer income as the primary income.

Your expenses are anything you have spent money on for your business in the last tax year.

The UK Property

Your income is the total amount you have earned from any furnished holiday lettings and from any other properties you put on rent.

Expenses can be the costs of maintaining and owning property unless you claim the trading allowance.

The Capital Gains

In the case of capital gains, your income is your total disposal proceeds for residential & non-residential property, shares and securities.

Expenses can be claimed for the allowable costs on buying and improving assets.

Let's understand the Self Assessment tax bill

After filing the self-assessment tax return, you will get a bill from HMRC in case you owe any tax.

Generally, it takes up to 72 hours after the submission of your return for a final tax calculation to show up to your account.

Self-employed may need evidence of their earnings for various purposes, such as renting an apartment or applying for a mortgage etc.

If so, you can also request your SA302 tax calculation that shows earnings over the past 4 years, as well as an overview for the specific tax year. 

Payment Of The Self Assessment tax

In case you owe the tax, HMRC will tell you the exact amount you need to pay.

You can pay your tax bill by:

  • Bank transfer - CHAPS or Faster Payments
  • Paying-in slip from HMRC
  • Debit cards
  • Cheque
  • Direct Debit

You cannot pay your tax bill using a credit card.

What is the Self Assessment tax return deadline?

As the tax year in the UK runs from 6 April to 5 April following year.

So, for instance, the 2019-20 tax year covered a period from 6 April 2019 to 5 April 2020 which means the postal deadline was 31 October 2020 and the online deadline is 31 January 2021. Late submission of the tax return will incur penalties.

However, because of COIVID-19, HMRC has waived the penalty provided you file our tax return by 28 February 2021. However, interest will be payable on any unpaid tax liability.

However, it is crucial to remember that 31 January is not just the deadline for completing your return – it is generally the date you've to make your tax payment along with the first payment on account to the HMRC. The following payment is usually due on 31 July. 

The deadlines for submission to HMRC:

  • 31 October for the postal submissions
  • 31 January for the online submissions (temporary extended to 28 February 2021)

Covid-19 Deferrals

This year was possible to defer the payments which were due in July of 2020 and those that will be due in January of 2021 until January of 2022.

This is part of the government's Time to Pay arrangements, which recognise the impact of COVID-19 on self-employed people. It is also possible to pay the tax you owe in instalments.

Visit Gov.UK  for more details. 

Also, visit our blog about self-employment income support scheme to understand how to access this scheme.

Penalties for late filing

HMRC allow nearly ten months from the tax year-end to file the Self Assessment Tax Returns – but do not leave it that late!

Because as soon the return is one day late, HMRC will automatically issue the first penalty and will continue with additional penalties until you file the return.

Tax Overdue byPenaltyNotes
One day£100This applies even if there's no tax to pay or if a tax due has been paid, but a return hasn't been filed.   HMRC has waived the penalty provided you file our tax return by 28 February 2021. However, interest will be payable on any unpaid tax liability.
Three months£10 for each following dayUp to the 90 day maximum of £900. This is in addition to the penalty mentioned above
Six months£300 or 5% of tax due, whichever is higherThis is in addition to the penalties mentioned above
Twelve months£300 or 5% of tax due, whichever is  higherIn serious cases, they may apply a penalty of up to 100% of the tax due

Quick Tips For Self Assessment Tax Return

  • Get registered for Self  The Assessment as soon as possible

Don't leave it too close to the deadline. As HMRC says, it can take up to 10 working days to receive the UTR and up to 10 additional days to receive your activation code. So keep in mind to register at least one month before the deadline.

  • Don't rush

You don't have to complete the Self Assessment return in one go. You can save your progress and can come back to it.

  • Keep accurate records

Just don't throw anything away either. As a taxpayer, you have to keep records for at least a year after filing tax. If you are self-employed, you must have records for six years.

  • Check & check again

Before hitting submit on your tax return go back through each section to ensure you've completed everything, you need to.

  • If you've made a mistake

You can be able to make changes up to the Self Assessment deadline the following year.

  • Download HMRC's help sheets to assist you with each section of the tax return.

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About author

Sophia

Sophia is a full-time financial writer at experlu. she is a passionate blogger and love to share her knowledge on various subject. Content created by Experlu– are loved, shared & can be found all over the internet on high authority platforms.