If HMRC needs to contact you about anything confidential they’ll reply by phone or post.
You’ll need to apply for a National Insurance number if you’re moving to the UK to set up a business.
- if you’re self-employed and have a National Insurance enquiry or need to report changes to your personal details
- to register for National Insurance, Income Tax and VAT if you’ve recently become self-employed
Contact Income Tax: general enquiries if you have a question about Class 4 National Insurance.
0300 200 3500
+44 191 203 7010
Monday to Friday: 8am to 6pm
Closed on Saturdays, Sundays and bank holidays.
You can also find out information in:
You can use NGT text relay if you cannot hear or speak on the phone: dial 18001 then 0300 200 3100.