Have to do one every year for the past 10 years, ever since they stated I was claiming tax credits (which I wasn't) and had two jobs (which I didn't). This year thought I'd escaped as got nothing through... but phoned up and checked. Appears because I always do it on-line, they thought I didn't need a paper pack sending through, and yes, I still need to do one. Glad I checked. Be doing one next week. :x