If they send you a tax return you have to fill it in.Fortunately, if you are only employed or on benefits itu2019s really, really quick. Thereu2019s about 6 boxes to do, and you can get all the info from your P60.You can also tell them you no longer need to file a self assessment due to a change in circumstances. This will stop it for future tax years, but not the current one, so you might have to do two more - one for last year, one for this.I think you can do this through your account online.