5th 
Deadline for notifying HMRC of new sources of taxable income or gains or liability to the High Income Child Benefit Charge for 2019/20 if no tax return has been issued
Tax and NI due under a 2019/20 PAYE Settlement Agreement

19th
PAYE, Student loan and CIS deductions are due for the month to 5th October 2020
PAYE quarterly payments are due for small employers for the pay periods 6th July 2020 to 5th October 2020

31st
Deadline for submitting ‘paper’ 2019/20 self assessment returns
Deadline for submission of 2019/20 self assessment returns if you require HMRC to compute your tax liability and/or if tax underpaid is to be collected by adjustment to your 2021/22 PAYE code

2nd 
Advisory Fuel Rates

19th
PAYE, Student loan and CIS deductions are due for the month to 5th December 2020

30th
Online filing deadline for submitting 2019/20 self assessment return if you require HMRC to collect any underpaid tax by making an adjustment to your 2021/22 tax code

2nd 
Deadline for submitting P46(car) for employees whose car/fuel benefits changed during the quarter to 5th January 2021

19th
PAYE, Student loan and CIS deductions are due for the month to 5th January 2021

2nd 
Advisory Fuel Rates

3rd
5% late payment penalty on any 2019/20 outstanding tax which was due on 31st January 2021 and still remains unpaid

19th
PAYE, Student loan and CIS deductions are due for the month to 5th March 2021

31st
Last minute planning for tax year 2020/21