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HMRC has over 130 phone lines, but most of them are not relevant for everyday taxpayers.
This is a list of the most important ones.
You’ll need your National Insurance and UTR numbers.
You’ll probably need your National Insurance and UTR numbers.
For all other special situations (for example, child benefit, tax credits, non-resident landlord taxes, etc.), check this complete (130!) list of phone numbers on HMRC’s website.
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