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Found an error in a rate or calculation? Have a suggestion for a new calculator? We read every message and aim to reply within 2 business days.
Response time
We aim to reply within 2 business days. Rate correction reports are prioritised.
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Reporting a rate error?
Please include the calculator name, the figure you believe is wrong, and a link to the official HMRC or GOV.UK source. This helps us fix it faster.