1 – Due date for payment of Corporation Tax for accounting periods ending 31 March 2020
7 – Electronic VAT return and payment due for quarter ended 30 November 2020
14 – Filing deadline for form CT61 to report interest payments in quarter ended 31 December 2020
14 – Deadline for employers to make a claim for furlough days in December.
19/22 – PAYE/NIC, student loan and CIS deductions due for month to 5/1/2021
29 – Deadline for filing claim for third Self-Employment Income Support Scheme.
31 – Electronic filing deadline for 2019/20 self-assessment returns for individuals, partnerships and trusts. Payment deadline for any balance of liability from these returns, and any first payment on account due for 2020/21
31 – Standard deadline for amending 2018/19 returns. Also, last date to file overdue 2018/19 return without incurring a minimum penalty of £300, and last date to pay any tax for 2018/19 overdue before incurring a further 5% penalty