UK Tax Return Deadlines 2026: Key Dates for 2024/25 & 2025/26
Tax deadlines in the UK rarely feel urgent—until suddenly they are. One day, you’re confident you’ll “do it early this year,” and the next, it’s January, your inbox is full of HMRC reminders, and you’re unsure which tax year applies, what payments on account mean, or how quickly penalties stack up. If that sounds familiar,

