7th January – Deadline for VAT returns and payments of the accounting quarter period ending 30 November 2023
19th January – Monthly deadlines for postal payments of CIS, NICs and PAYE to HMRC
22nd January – Monthly deadline for electronic remittance of CIS, NICs and PAYE to HMRC
31st January – The due date for payment of Corporation Tax for period ended 30 April 2023
The 2022-23 self-assessment tax return is due for online submission and payment.