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Self-assessment tax return

Tax returns 2017: important deadlines

By Ian Robinson

Article 4 of 10

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Tax returns 2017: important deadlines

Put these key dates in your diary to avoid a penalty for missing the tax return deadline.

In our video, we explain how to use the Which? tax calculator - tot up your tax bill and submit your return direct to HMRC.

Here, we list the key deadlines to bear in mind so you can ensure your 2016-17 tax return is submitted on time.

How to submit your 2016-17 tax return

There are two ways to submit your tax return. You can either send a paper tax return to HMRC or fill in an online tax return online on the HMRC website.

Making your tax return online has numerous advantages, which you can read more about on the online tax returns page of this guide. 

Alternatively, you can use the Which? online tax calculator. Our easy-to-use and jargon-free tax calculator offers personalised tax tips, and you can submit the form directly to HMRC.

Different ways to submit your tax return

Depending on how you choose to submit your tax return, the deadline for submitting it will be different.

  • Paper tax returns need to be filed by 31 October. So for tax returns relating to the year April 2016 to April 2017, for example, all paper returns should be submitted by 31 October 2017.
  • The deadline for filing online is three months later – 31 January. So tax returns for the year April 2016 to April 2017 can be filed online up to 31 January 2018.

Important deadlines for your 2016-17 tax return

31 October 2017 This is the deadline for filing a paper tax return, whether you choose to work out how much tax your owe yourself or want HMRC to do it. However, if you receive notice that you must file a tax return after 31 July 2017, you'll need to send back the completed form within three months of the notice's date of issue.

30 December 2017 If you file your tax return online and also have earnings taxed under PAYE, you can opt to have overdue tax (if it is less than £2,000) collected by PAYE, provided you filed your online return by this date. The advantage of this is that any tax payable would be paid over 12 months from April 2017, rather than in a single lump sum by 31 January 2018.

31 January 2018 This is the final deadline for online tax returns, unless the notice to make an online tax return is issued by HMRC after 31 October 2017, in which case you have three months from the date of issue. This is also the deadline to pay any tax due for paper and online filers.

It's important to be aware that filing your tax return late, or failing to pay the tax you owe on time, will probably mean you face extra penalty fees and interest charges.  

Find out more: If you need more help with tax, or any other aspect of your finances, sign up to a £1 trial with Which? and you can speak to a member of our Money Helpline team to get individual guidance.

  • Last updated: January 2017
  • Updated by: Gareth Shaw

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