Many people aren't aware though that the process is not an immediate one. You will firstly need to register on the HMRC website after which you will then receive an activation code through the post within 7 working days.
With this in mind it is being advised that TODAY is really the latest you should leave it register. So even if you haven't started the number crunching you need to get online and register with HMRC.
Tip: Don't leave your filing until the very last day. You may have computer problems and this will most likely not be a good enough excuse.
If you need any help at all with your self assessment email us or call 01603 861617.