What happens if I make a mistake or send incorrect information?
If any of your personal details have changed, or if you find that you (or the Tax Office!) has made a mistake, then you must let HMRC know as soon as possible. You can be penalised if your Tax Return is incorrect through fraud or negligence â€“ for example of you provide incorrect figures on purpose – then you could end up with a criminal conviction if you try to â€˜cheatâ€™ the tax system. All in all itâ€™s best to get it right first time if you possibly can!
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