Tell HMRC about changes that could affect your tax code
This service is part of the personal tax account, and you can use it to check:
- your tax code
- the information HMRC holds about your employment
- an estimate of how much tax you’ll pay
Find out how to tell HMRC about a change to your personal details.
Check when you can expect a reply from HMRC
Find out when you can expect to receive a reply from HMRC to a query or request you’ve made.
If HMRC needs to contact you about anything confidential they’ll reply by phone or post.
If you think you have overpaid tax
Before you contact us you can:
You can use Twitter to get general help from HMRC. We cannot discuss specific cases or an individual’s tax affairs, so please do not give any personal details.
Start your tweet with @HMRCcustomers
Monday to Saturday: 8am to 8pm
Closed on Sundays and bank holidays.
Before you call
This helpline may ask you some security questions. Make sure your personal details and address are up to date in your personal tax account or you could fail telephone security. If you do not already have a personal tax account, you can set one up.
Have your National Insurance number with you when you phone.
Call HMRC for help with:
- questions about Income Tax and Class 4 National Insurance, including issues with:
- identification and verification problems if you’re trying to register for a personal tax account
Marriage Allowance including:
- making a backdated claim if your spouse or civil partner has died
- applying for Marriage Allowance if you do not have a National Insurance number, because you do not intend to work or study in the UK
- cancelling your claim
- questions about tax on savings income (including refunds)
- general enquiries about Individual Savings Accounts (ISAs)
Monday to Friday: 8am to 6pm
Closed on weekends and bank holidays.
You can also find out information in:
Best time to call:
Phone lines are less busy before 10am.
When you call
These helplines use speech recognition software, so you’ll be asked why you are calling HMRC. Try to answer with short phrases and words, for example:
- ‘change my address’
- ‘question about my tax code’
- ‘question about taxable expenses’
If you cannot use speech recognition software, find out how to get help from HMRC if you need extra support.
You can use Relay UK if you cannot hear or speak on the phone: dial 18001 then 0300 200 3300.
HMRC may ask if you want to add voice identification to your account. You can find out more in the Voice Identification Privacy Notice.
Find out about call charges
Write to HMRC at this address for all Income Tax queries except complaints.
You do not need to include a street name, city name or PO box when writing to this address.
Couriers should use a different address.