Hi all, Bit of a story. Let me state the facts. - I relocated to Australia in 2010 and left in May 2012. - I received an internal transfer from my company, whom I worked for a total of about 8 years (6+ in UK, 18 months in Oz) - Over the course of my employment I received a lot of stock options that mature over years. - The vast majority of these were awarded to me when I was in the UK and matured when I was in the UK. A few matured while in Australia but not a lot at all. - I left the company, left Australia and sold my stock options. - I sold my stock option in August 2012 when I was back in the UK. - I put the stock options on my UK tax return for 2012/2013. I have not tried to dodge tax but simply claimed the tax where I saw fit - I'm aware the issue is the ATO may not see it as black and white as this. Recently the ATO sent me a letter (in the UK) asking for the tax. It seems my company notified them as they are a benefit and now the ATO wants the tax. Does anyone have any idea what the ATO can do? How powerful is the ATO/HMRC relationship?