01 September Corporation Tax for year to 30 November 2016
19 September PAYE & NIC deductions and CIS return and tax, for month to 5 September 2017 (due 22 September if you pay electronically)
1 October Corporation tax for year to 31/12/16
5 October Deadline for notifying HMRC of chargeability for 2016/17 if not within Self Assessment and receive income or gains on which tax is due.
19 October PAYE and NIC deductions, and CIS retun and tax for month to 5/10/17 (due 22 October if you pay electronically).