If you’ve paid too much tax and want to claim back the over-payment, use form R38. You can also use this form to authorise a representative to get the payment on your behalf. Fill in and sign the form then send it to HMRC.
You may be able to claim on line.
Email HMRC to ask for this form in Welsh (Cymraeg).
Before you start
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You’ll need to fill in the form fully before you can print it. You cannot save a partly completed form.