10+ Common Self Assessment Tax Return Mistakes
Familarise yourself with the most common Self Assessment tax return mistakes & how to avoid them to ensure you file a tax return correctly.
Self Assessment Tax Returns UK
DIY-ing your self-assessment tax return? Here you’ll find easy-to-follow guides to help get you through the process of filling in your return so you can press the submit button with confidence. From finding the paperwork you need to declaring different types of income and choosing the right sections to fill in, you’ll find everything you need all in one place.
Friendly Disclaimer: Whilst I am an accountant, I’m not your accountant. The information in these guides are legally correct but are for guidance and information purposes only. Everyone’s situation is different and unique so you’ll need to use your own best judgement when applying the advice that I give to your situation. If you are unsure or have a question be sure to contact a qualified professional. I cannot accept responsibility for any losses or penalties you may incur while following the contents.
Self Assessment Basics
- HMRC Self Assessment Explained
- How to Register for Self Assessment
- Do You Need to Complete a Self Assessment Tax Return?
- Tax Year Dates & Deadlines
- Claiming Self-Employed Expenses
- Self-Employment Taxes
- How to Tell HMRC You’ve Stopped Being Self-Employed
Completing Your UK Self Assessment Tax Return
- What Information Do You Need to Complete Your Tax Return?
- Beginners Guide to Completing Your Tax Return Online
- How to Complete the Employment Page of Your Tax Return
- How to Complete The Self-Employment Section of Your Tax Return
- Where to Show Your SEISS Grant On Your Tax Return
- Do I Need to Declare Bank Interest On My Tax Return?
- Child Benefit and Self Assessment Tax Returns
- How Tax Works for Self-Employed Foster Carers
- How to Amend Your Tax Return
Paying Your Tax Bill
- How to Budget for Your Tax Bill
- HMRC Tax Payment Plans Explained
- How to Pay Self Assessment Tax Through PAYE
Penalties & Late Payment Interest
- What Happens if You Miss the Self Assessment Deadline?
- Self Assessment Tax Return Penalties Explained
- How to Appeal an HMRC Self-Assessment Penalty (SA370)
- How Much Interest does HMRC charge on Late Payment of Personal Tax?
Other Helpful Guides
- What to Do If You Have Lost Your HMRC User ID and Password
- Should You Get an Accountant to Do Your Tax Return?
- How to Find Your UTR Number Online
- HMRC Basis Periods Explained
- The Cash Basis for Tax Returns Explained
- Self-Assessment Tax Returns for £100,000 + Earners
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What Information Do You Need to Complete Your Tax Return?
A list of common documents and information you may need to complete your self-assessment tax return.
Self Assessment Tax Payment Plans Explained
Find out how you can arrange for more time to pay your self assessment tax bill with HMRC by setting up a payment plan.
How to Register for Self Assessment
Find out how to register for self assessment, check whether you need to apply and what happens once you are registered with HMRC.
Self-Assessment Tax Returns for £100k Earners
Find out how self assessment works if you earn over £100k, if you need to register and tax tips to help you pay less tax on your £100k+ income
Can You Do a Paper Tax Return?
Find out whether you can do a paper tax return, when it is due for filing and where you can find a copy to send to HMRC.
Where to Show Your SEISS Grant On Your Tax Return
Find out how to show your SEISS grant correctly on your tax return and what you need to include in business turnover.
Should You Get an Accountant to Do Your Tax Return?
Wondering whether you should get an accountant to do your tax return? Understand the legal requirements as well as the pros & cons of engaging a professional.
Do I Need to Do a Tax Return If I’m Earning Under £10000?
Find out if you need to do a tax return if you earn under £10000 or below the personal allowance and have no tax to pay.
Do You Need to Complete a Self Assessment Tax Return?
Wondering if you need to complete a self-assessment tax return? Find out who needs to fill in a tax return, why & what HMRC needs to know.