by mullet on Sat Jan 29, 2011 2:14 pm
The statutory filing date for 2008-09 was 31-01-2010, so you have until 31-01-2011 to amend the return (it is not 1 year from when you submit it). But if (as I suspect) that return is currently under enquiry by HMRC then whilst you can make an amendment, it will not be given effect until the Inspector concludes the enquiry. So you can't escape a penalty in this way.