31 January 2017 : Final deadline for Tax Returns.
31 January 2017 This is the final deadline for online tax returns. If you file your tax return late, you will face a fine of minimum £100 up-to £1600 from HMRC. For the tax year ended 5 April 2016, the final deadline for self-assessment tax returns is: 31 January 2017 – online. Who Has to Submit Tax Return? Over nine million people need to complete a self-assessment tax return (SA100 or SA200) and submit this to their tax office. You'll need to fill in a tax return if: you're