Contacting HMRC about tax credits

Overview

Now that tax credits have closed, HMRC no longer operate the digital tax credit system either online or via the HMRC app. The main channels you can use to contact HMRC about tax credits are by telephone and by post. The main contact details are available on the GOV.UK website. There is also an option to contact HMRC on X (formerly Twitter). HMRC do not have a facility to let you email them directly.

Tax credits digital service

HMRC’s digital service, ‘Manage your tax credits’, ended on 5 April 2025 and information about your tax credit awards is no longer available via your personal tax account or the HMRC app. HMRC’s telephone and post services for tax credits will continue for some time and some online forms, such as the appeals form and dispute form, continue to be available via the GOV.UK website.

X (Twitter)

You can use X (Twitter) to get general help from HMRC but they cannot discuss specific cases or anything relating to an individual’s personal information, so please do not give any personal details.

Contacting HMRC by telephone

The main tax credits helpline is now closed. There are two phone numbers to use from May 2026:

• To speak to HMRC about repayment of tax credit overpayments you can call 0300 200 3800 (Monday to Friday 8am to 5pm). 
• To speak to HMRC to report changes that affect tax credits or if you have a general tax credit enquiry you can call 0300 322 9129 (outside of the UK +44 2890 538192). You can use Relay UK if you cannot hear or speak on the phone, dial 18001 then 0300 322 9129. 

You will normally be asked for your national insurance number. This is two letters, six numbers and a final letter, and you might also be asked to answer some security questions.

It is always a good idea to make a note of the date and time of your call, the adviser’s name and a brief note of what was said.

Contacting HMRC by post

If you want to write to HMRC by post you can find the address on GOV.UK.

Using a courier

Use this address for all post items being delivered to HMRC to either a closed HMRC site, a PO BOX or BX postcode by couriers.

HM Revenue and Customs, BP8002, Benton Park View, Newcastle Upon Tyne, NE98 1ZZ

You should mark your letter clearly, depending on what it is about and address the envelope to the relevant ‘team’ if possible.

• to tell HMRC about a change of circumstances: Change of Circumstances Team
• to ask for an explanation about why you have been overpaid or dispute an overpayment: Dispute Team
• to ask for a mandatory reconsideration or appeal against a tax credit decision: Appeals Team
• to make a complaint: Complaints Team.

It is a good idea to send letters by recorded delivery so that HMRC sign for the letter to confirm they have received it, or at least ask the Post Office for proof of postage if you do not wish to pay the extra for recorded delivery. Keep a copy of the letter and any enclosures for yourself if you can, and put the posting receipt in a safe place.

Keep a file with copies of all of your tax credit forms, decision notices and letters together with any details you used to fill in your claim and calculations of how you worked out your figures.

Face to face

HMRC have had an enhanced system of support for taxpayers and tax credit claimants who need extra help dealing with HMRC. The service HMRC provide means that the telephone helplines and online are the initial way that customers can speak to HMRC.

Customers who are identified as needing extra help (according to criteria HMRC have developed) are then offered support best suited to them, this might still be by phone, but with a specialist telephone adviser who can deal with the queries in-depth or by arranging a set time to call or perhaps exceptionally a face to face meeting with someone from HMRC at a place convenient to the customer (including at their home), calling on a team of HMRC specialist mobile advisers. More information can be found on the GOV.UK website.

Extra help when contacting HMRC

There are many reasons why you might need some extra help when contacting HMRC. For example, it may be that you have a disability or English is not your first language or you perhaps need more time because of your circumstances. There is more information on the GOV.UK website about contacting HMRC if you have particular needs or need extra support.

Acting on behalf of someone else

If you need help dealing with HMRC about your tax credits you can give permission for someone else to do this on your behalf.