Key date: 30 September 2006

File your tax return by 30 September 2006 if you want the Taxman to calculate how much tax you owe for the tax year 2005/06. Normally, this liability is due for payment on 31 January 2007.

This date is also the deadline if you want your PAYE code adjusted to collect small amounts of tax owing through your wages rather than paying the cash yourself in January.