The taxman is sending warning letters to those who have now run up late-filing penalties of £1,300 for that year, under self-assessment.
The taxman is investigating a "serious fraud" which allegedly involves Gordon Ramsay's restaurant business.
A number of celebrities, including pop star Robbie Williams, are facing multi-million pound tax bills if a tribunal judgement goes against VCT provider Ingenious Media.
Firms devising and running tax avoidance schemes are "running rings" around Her Majesty's Revenue & Customs (HMRC), MP Margaret Hodge has said.
Fourteen people - including a former HM Revenue & Customs (HMRC) officer - have been ordered to pay back over £1m for their part in a £1.2m tax fraud.
Retirees with pension pots worth less than £18,000 will no longer have to pay higher-tax rate when taking a pension pot as cash, according to reports today.
Chancellor George Osborne has given HM Revenue and Customs extra powers to tackle advisers promoting aggressive tax avoidance schemes.
Up to two million people are to have their credit files secretly checked under a crackdown on tax evasion to be unveiled by George Osborne to help raise another £10 billion.
Hundreds of suspected tax dodgers received letters from HM Revenue & Customs (HMRC) this weekend stating their financial affairs are under close scrutiny.