Around 31% of adults have paid the incorrect amount of tax at some point - with the average overpayment worth £689, according ...
The codes show your employer or pension provider how much tax-free income you are entitled to ...
MoneyWeek on MSN
More than five million taxpayers overpay with wrong tax codes – how to check yours is right
HMRC overcharged taxpayers £3.5 billion in income tax the latest data shows, with tax coding errors largely to blame.
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