05/10/2026
If you need to submit a tax return for 2025/26 for the first time, you must notify HMRC by today, 5 October 2026.
You may also need to reactivate your account if you’ve registered before but didn’t need to submit a return for 2024/25.
Started working for yourself, earning from a side hustle or receiving rental income? Check whether you need to register.
The deadline for submitting your online return and paying any tax due is 31 January 2027 - but registration comes first.
Unsure where you stand? Contact our Baldock team for clear, practical advice.
🌐 https://www.mccoles.co.uk