Hi, I'm new to this forum and joined to ask a question. My new chartered accountant has discovered an accounting error made by my old chartered accountant. The old accountant has declared the tax I paid in Australia on my Australian income as UK tax paid for the year 2010-11. As a result I may have underpaid 2010-11 tax by £1500. If this is a true error, how can I proceed, what responsibility does the old accountant have to correct the mistake, is there a regulatory body or similar that I can get advice from? Please let me know your thoughts. thanks