Tax Day 2024 Extension Uk. Customers have 100 days left to file their tax return online or by paper by 31 january 2024. If you’re doing a paper tax return, you must submit it by midnight 31 october 2023.
In april 2024, a tax administration & maintenance day announcement confirmed that new guidance would be published in 2024, including an online pay. Hmrc reminds customers to file their tax returns online by 31 january 2024 and avoid penalties.