Around 31% of adults have paid the incorrect amount of tax at some point - with the average overpayment worth £689, according ...

HMRC overcharged taxpayers £3.5 billion in income tax the latest data shows, with tax coding errors largely to blame.

An incorrect code could mean you're entitled to a refund running into thousands of pounds ...

Thousands of workers up and down the UK are thought to be on the wrong tax code, meaning they’re not getting the right amount ...

According to figures obtained through a Freedom of Information Request (FOI) by national accountancy group UHY Hacker Young, ...

Martin warned "millions of them are wrong each year" ...

Martin Lewis issues tax code warning to millions of workers - ...

The codes show your employer or pension provider how much tax-free income you are entitled to ...