31 January - Self assessment filing deadline for 2013 tax returns.
1 February - £100 penalty for 2013 tax returns not filed on or before 31st Jan 2014
2 February - Last day for car change notifications in the quarter to 5 January - Use P46 Car
19/22 February - PAYE/NIC and CIS deductions due for month to 5/12/2013
28 February - First 5% penalty surcharge for any unpaid 2012/13 tax liabilities due on 31 Jan 2014 paid after this date