Three and a half million taxpayers will get tax refunds averaging £380 from next week, while another 1.6 million will be asked to repay a typical £540 as they've underpaid.
Almost 12,000 taxpayers have been wrongly threatened with a penalty for not submitting a self-assessment return by HM Revenue and Customs (HMRC), despite telling the department they weren't self-employed.
Chancellor George Osborne has partly reversed a planned cut in child benefit, meaning more families will be entitled to help than was originally proposed, though anomalies still exist and confusion still reigns.