Self-assessment checklist
The tax return filing deadline is 31 January following the end of each tax year. Use our checklist to reduce the chances of making any errors.
Tax returns
Self-assessment is the current method of reporting your income and capital gains to HMRC each year. It is easy to make mistakes, especially if you are unable to file the return until near the deadline of 31 January. Common mistakes include:
- missing income sources
- missing capital gains
- underclaiming tax reliefs
- not reporting pension contributions or liability to the annual pension charge
- believing the return to be filed when it isn’t successfully lodged with HMRC.
Making any of these errors can lead to penalties and/or interest. Use our Self-assessment Checklist to help ensure you’ve done everything to minimise errors.
Related Topics
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Selling spare items to your company
You’re short of cash but if you use the traditional methods to take more money out of your company you’ll pay higher rate taxes. Is there another way to extract profits without paying income tax or NI?
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No such thing as a (tax) free lunch?
You run a small consultancy company and treat your staff to lunch in the office once a week. Your bookkeeper says it’s a taxable benefit in kind because staff lunches are only exempt if they are provided in a workplace canteen. Is this correct?
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Judge criticises use of fabricated AI-generated cases in HMRC appeal
A tax tribunal judge has criticised the use of apparently fabricated case references generated by artificial intelligence in an appeal against HMRC. The incident highlights growing concerns over the use of AI tools in legal and tax proceedings. What happened?

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