1. Home
  2. Limited Company FAQ's
  3. What are the key dates I should be aware of when submitting my self-assessment return?
  1. Home
  2. Payroll & Year End
  3. What are the key dates I should be aware of when submitting my self-assessment return?

What are the key dates I should be aware of when submitting my self-assessment return?

The below information has been listed in relation to the tax year ending 5th April 2020.


  • 31st July 2020: Second payment on account for 2019/20.

    Note: if your cashflow is impacted by COVID-19 you do have the option to defer your second payment on account to 31ST January 2021.
  • 31 October 2020: If you send a paper tax return, you must send it back by this date if you want HMRC to collect tax through your tax code, if possible, where you owe less than £2,000. You must have a PAYE source of income to facilitate collection of the underpaid tax.
  • 5 October 2020: If you have not previously completed tax returns but you know that you must complete one for 2019/20, this is the final date for notifying HMRC that you need to complete a tax return.
  • 31 October 2020: If you have been issued a paper tax return form this is the last day you can submit it to HMRC. After the 31 October 2020 you must submit your tax return electronically.
  • 31 December 2020: If you send back your tax return over the Internet you must send it back by this date if you want HMRC to collect tax through your tax code, if possible, where you owe less than £2,000. You must have a PAYE source of income to facilitate collection of the underpaid tax.
  • 31 January 2021: The final date for submitting your 2019/20 tax return. Please note that tax returns submitted after the 31 October 2020 must be submitted electronically.
  • 6 April 2021: This is when the new tax year starts.
Updated on 27th July 2020

Was this article helpful?

Related Articles

Need Support?
Can’t find the answer you’re looking for? Don’t worry Brookson are here to help!
Request FAQ