HMRC is warning individuals and businesses that file self-assessment tax returns about scammers trying to steal money or personal information.
Taxpayers reported over 570,000 scams in the last year, according to HMRC.
At this time of year, self-assessment customers are at increased risk of falling victim to scams even if they don't mention self-assessment, HMRC said.
Scam texts, emails or calls often offer a ‘refund' or demand unpaid tax while posing as HMRC communications.
In the 12 months to January 2022, nearly 220,000 scams reported to HMRC offered bogus tax rebates.
In January 2022, phone scams rose to 3,995 compared to 425 reported in April 2020.
Myrtle Lloyd, director general for customer services at HMRC, said:
"If someone contacts you saying they're from HMRC, wanting you to transfer money or give personal information, be on your guard.
"Never let yourself be rushed, and if you're in any doubt then check our ‘HMRC scams' advice on GOV.UK."
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