Contact the HMRC general enquiries team by calling their local-rate phone number 0330 200 3300 or alternatively you can phone this support helpline 0843 504 7177 (for 7p per minute + access charge) for tax, self-assessment and national insurance enquiries.
Call HMRC by calling their local mobile-friendly number number 0330 200 3300 or contact HMRC general enquiries by calling this helpline 0843 504 7177 at £0.07 per minute + your operator’s access charge. HMRC are responsible for the regulation of all tax matters within the UK, as well as overseeing payment of some tax-related benefits such as tax credits and child benefit. You should call 0300 200 3300 if you need any advice about your Income Tax or to check how much income tax you should be paying for your salary. You should also call this helpline if you need to change your official address, if you need a PAYE coding notice or to notify HMRC that you are on an incorrect tax code and therefore require a tax office refund (rebate). You can also check your income tax for the current tax year by going to HMRC’s official online service www.gov.uk/check-income-tax-current-year.
If you would prefer to send HMRC a letter regarding your income tax you can use their official postal address provided here:
Pay As You Earn and Self Assessment,
HM Revenue and Customs,