A complete guide to Self-Assessment 2020/21 • 31 January 2022 – Self Assessment deadline (paying and filing) • 28 February 2022 (extension) – last date to file any late tax returns to avoid a late filing penalty • 1 April 2022 – last date to pay any outstanding tax or make a Time to Pay arrangement, to avoid a late payment penalty HMRC gives Self-Assessment taxpayers more time to ease COVID-19 pressures. On 6th January 2022, HMRC announced that penalties for late filing will not be charged for those who file Self Assessments for 2020/21 online by 28 February 2022 and for those who pay the tax due in full or set up a payment plan by 1 April 2022. This will give customers and their representatives additional time if they need it and will operate in the same way as the equivalent waivers last year. However, HMRC is encouraging customers to file and pay on time if they can by 31 January 2022 – almost 6.5 million have already done so. If you cannot pay your Self-Assessment liabili