You should send your letters to the address on the most recent correspondence from HMRC. If you dont have recent correspondence, you can find the addresses from the links (available on the HMRC website).
How do I register with HM Revenue and Customs?
Register by phone or mail Call the HMRC self assessment tax return Helpline at 0300 200 3310. Complete the relevant form and submit it via post. Form SA1 is for people. Form SA400 for partnerships. Form SA401 for partners.
Can I email HM Revenue customs?
HMRCs direct complaints email address is: iform.mailbox@hmrc.gov.uk this is useful because the window for complaint text within their online form only allows 1000 characters wholly insufficient.
How do I download HMRC forms?
You can download many HMRC forms, leaflets, factsheets and booklets from GOV.UK. Dont use this form to ask HMRC any questions, contact the relevant helpline instead. Give details of the forms or leaflets you need below. If HMRC cant send you them they will contact you.
How to communicate with HMRC?
HMRC have designated phone lines for different subjects: Self-Assessment helpline: 0300 200 3310. Child Benefits helpline: 0300 200 3100. Employer helpline: 0300 200 3200. Income Tax helpline: 0300 200 3300. National Insurance helpline: 0300 200 3500. HMRC online services helpdesk: 0300 200 3600.
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Apply online or by post. You can complete and submit your Data Protection Subject Access Request form online or print it and send by post. You can also send us a letter to ask for information that you could not find in the personal tax account, HMRC app or Income Record Viewer.
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Related links
Joint Chiefs of Global Tax Enforcement
May 17, 2025 The Joint Chiefs of Global Tax Enforcement (known as the J5) are committed to combatting transnational tax crime through increased enforcement collaboration.
Preparing Multinational Companies for Transfer Pricing
by TC Pearson 2006 Cited by 2 3 Advice focuses on assisting companies to prepare for a transfer pricing analysis to avoid potential tax problems with government auditors.
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