1 May 2017 – Due date for Corporation Tax due for the year ended 31 July 2016.19 May 2017 – PAYE and NIC deductions due for month ended 5 May 2017. (If you pay your tax electronically the due date is 22 May 2017)19 May 2017 – Filing deadline for the CIS300 monthly return for the month ended 5 May 2017.19 May 2017 – CIS tax deducted for the month ended 5 May 2017 is payable by today.31 May 2017 – Ensure all employees have been given their P60s for the 2016-17 tax year.1 June 2017 – Due date for Corporation Tax due for the year ended 31 August 2016.19 June 2017 – PAYE and NIC deductions due for month ended 5 June 2017. (If you pay your tax electronically the due date is 22 June 2017)19 June 2017 – Filing deadline for the CIS300 monthly return for the month ended 5 June 2017.19 June 2017 – CIS tax deducted for the month ended 5 June 2017 is payable by today.