HMRC Contact & Enquiry

So that they can deal with your enquiry promptly, when calling HM Revenue & Customs please have any recent correspondence or a relevant reference number to hand.
Follow this link to find your nearest HMRC Enquiry Centre 

HM Revenue & Customs Online Services

HMRC's Online Services are safe, secure and a quick and convenient way for you or your authorised agents to deal with a whole range of tax, excise and benefit related issues.
Online Services and features include:

• Access to real time accounts and the ability to amend information such as contact details.
• Checking eligibility and submitting claims for benefits.
• Submitting tax, excise and other returns and declarations and paying electronically.