Twelve people including a woman in Wellingborough have been arrested in the latest clampdown on tax fraud.
The new HMRC taskforce targets individuals and organised criminal gangs across the UK believed to have fraudulently claimed repayments to which they were not entitled.
The taskforce is expected to recover up to £6m.
Director general of enforcement and compliance at HMRC Jennie Granger said: “Tax fraud is serious – it’s not a victimless crime.
“People who fraudulently claim a tax repayment are robbing the rest of us and denying money for vital public services.
“Not only could they face a heavy fine, but criminal prosecution as well.”
As well as the 24-year-old woman in Wellingborough, two men and two women were arrested in Eastbourne, as well as two men in Luton, one in Maidstone and one in Forest Gate, and a woman in Ilford. Two men were also held in Scotland as part of the same operation.
HMRC has collected more than £290m as a result of more than 90 taskforces launched since 2011.
Taskforces are specialist teams that undertake intensive bursts of activity in specific high-risk trade sectors and locations in the UK where there is evidence of tax evasion and fraud.
The teams visit traders and individuals to examine their records and carry out a series of compliance checks.
If you know anyone who is evading their taxes, you can tell HMRC by calling the Tax Evasion Hotline on 0800 788 887.