HMRC will fine 335,000 people £100 each unless they act before November

Anyone submitting a physical paper return must do so before October 31, while anyone filing their online has until January 31, 2025, to do so.

335,000 people have until the end of October to submit their paper self-assessment tax returns or risk a £100 fine from HMRC. Anyone submitting a physical paper return must do so before October 31, while anyone filing their online has until January 31, 2025, to do so.

Alastair Douglas, CEO of TotallyMoney, said: "For some with vulnerabilities or in special circumstances, physical forms might be easier. This can include having dyslexia, autism, or a similar condition, sensory disabilities, or other health conditions such as stress and depression. And if this includes you, then contact HMRC’s extra support team for assistance."

He added: "They’re specially trained, and can guide you through the process with a video appointment or phone call — you’ll just need to mention your situation when contacting the HMRC helpline or webchat. You can also designate somebody to deal with HMRC on your behalf, and this doesn’t just have to be a tax or accountancy professional or voluntary organisation, but can also be a close friend or family member who you trust.

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"There are forms available so don’t hesitate to get support if you need it." A £100 fine awaits those who fail to meet these deadlines if their returns are up to three months late. Self-assessment tax returns are crucial for individuals with untaxed income such as the self-employed or sole traders earning over £1,000.

Those with a total taxable income exceeding £150,000, those liable for Capital Gains Tax or the High Income Child Benefit Charge also need to arrange this return. The deadline for settling your tax bill on self-assessment returns is midnight on January 31, 2025.

Advance payers will face a second deadline of July 31 next year, and late payers may incur penalties, which can only be appealed with a reasonable excuse, HMRC says.