HMRC has warned users of its Self Assessment system to remain vigilant to scams that claim to be from the department.

Taxpayers reported over 170,000 potential scams to HMRC in the 12 months to 31 July, with 47,000 of these reports involving a fake tax refund.

The taxman said it is aware of scammers impersonating its Self Assessment team, offering fake refunds or demanding urgent payments to steal personal and banking information.

It reminded taxpayers never to share their passwords, usernames or access codes, even with someone they trust or helps them with their tax.

HMRC said that filing tax returns early can help customers spot scams more easily as those who have already submitted their tax return are less likely to be caught off guard by scam attempts closer to the Self Assessment January deadline.

Kelly Paterson, chief security officer at HMRC, said: “Scammers target individuals when they know Self Assessment customers will be preparing to file their tax returns. We’re urging everyone to stay alert to scam emails and texts offering fake tax refunds.”

The taxman asked those targeted by potential scammers to report attempts to HMRC via email (This email address is being protected from spambots. You need JavaScript enabled to view it.), via Gov.uk, or by forwarding suspicious texts to 60599.