HMRC, the UK tax authority, is actively addressing various scams targeting taxpayers. They are working to identify individuals owed £5,000 in backpayments. Concerns arise over messages warning of imminent action by HMRC. Scammers posing as HMRC officials have been contacting people, prompting caution. HMRC cautions against engaging with suspicious communications, including QR code scams. Taxpayers are urged to verify their HMRC accounts to prevent falling victim to ongoing scams.