Tax Diary September 2023 Mike Wakeford 17 August 2023 Share 1 September 2023 - Due date for corporation tax due for the year ended 30 November 2022. 19 September 2023 - PAYE and NIC deductions due for month ended 5 September 2023. (If you pay your tax electronically the due date is 22 September 2023) 19 September 2023 - Filing deadline for the CIS300 monthly return for the month ended 5 September 2023. 19 September 2023 - CIS tax deducted for the month ended 5 September 2023 is payable by today. CISCIS300corporation taxNICPAYE Contact Us Meet our Tax Team Jonathan Green Managing Partner Sue Lucas Chair Mike Wakeford Partner Chris Goodwin Partner