
The very final deadline for submission of the 2015 tax return forms is 31st January 2016 – however you also have to allow time for the form to be completed and agreed before the deadline.
If you are not registered with HMRC then you will need a code, which can take some time to arrive in the post – particularly with the delays in the postal service at this time of year.
January 31st is also the deadline for paying any tax you owe for 2014/15, so preparing the return as soon as possible is advised… otherwise you could get a nasty surprise if there is a tax bill you were not expecting, with not much time left before the payment deadline.
If you have a underpayment that could be collected through your tax code, then the deadline is earlier – 30th December 2015.
PS It has been announced that quarterly tax returns are planned for the future, so the days of completing the return several months after the year-end appear to be numbered…