Contacting HMRC
Source: gov.uk (2025-11-07)

How to contact HMRC, including the dedicated agent helplines available, the online services helpdesk, HMRC's digital assistant, 'Where's my reply?' tool and how to update your contact details.

Ask HMRC online - HMRC’s digital assistant

Ask HMRC online (https://www.tax.service.gov.uk/ask-hmrc/chat/agent-dedicated-line-ind) is an agent only channel which offers a faster alternative to telephony. It can help with a variety of self-assessment and tax payment queries. If you can’t find the answer you need, you will be referred to an HMRC adviser.

‘Where’s my reply?’ for tax agents

Find out when you can expect to get a reply from HMRC (https://www.gov.uk/guidance/wheres-my-reply-for-tax-agents) to a query or request you have made.

You can use this tool for queries or requests you’ve made about:
- Child Benefit
- Construction Industry Scheme (CIS)
- Corporation Tax
- employers’ PAYE
- Income Tax
- National Insurance
- Self Assessment
- tax credits
- VAT
As an agent, you can also check how long it will take HMRC to:
- register you as an agent to use HMRC online services
- process an application for authority to act on behalf of a client
- amend your agent details
Agent dedicated helplines

HMRC has dedicated helplines and contacts for tax agents (https://www.gov.uk/guidance/dedicated-helplines-and-contacts-for-authorised-agents).

If you need contact details for a tax and duty that does not have an agent dedicated telephone number or address, you can search the list of HMRC contacts (https://www.gov.uk/government/organisations/hm-revenue-customs/contact).

Other helplines

Helplines frequently used by agents on behalf of their clients.

Bereavement helpline

Contact the bereavement helpline (https://www.gov.uk/find-hmrc-contacts/bereavement-and-deceased-estate-enquiries#bereavement-helpline) for help with tax after someone dies if you’re dealing with their:
- Income Tax and Capital Gains Tax before they died
- estate in the administration period, without sending a tax return
Deceased Estate helpline

Contact the deceased estate helpline (https://www.gov.uk/find-hmrc-contacts/bereavement-and-deceased-estate-enquiries#deceased-estate-helpline) to get specialist advice on a deceased person’s estate, if you need to register for and send a tax return for the administration period.

Online services helpdesk

Contact HMRC (https://www.gov.uk/find-hmrc-contacts/technical-support-with-hmrc-online-services) with technical problems when using HMRC online systems, sending forms online, error messages and using HMRC free software and tools.

What to do if your tax agent business is changing

Find out what to do if your tax agent business is changing (https://www.gov.uk/guidance/what-to-do-if-your-tax-agent-business-is-changing) in some way, including if:
- your business is changing legal entity
- your agency firm is merging with another one
- you want to move clients between client lists
- your agency is de-merging from another one
- you stop trading as an agent
Updating your tax agent contact details

Tell HMRC about changes to your contact details (https://www.gov.uk/guidance/updating-your-tax-agent-contact-details-with-hmrc) and anti-money laundering supervision details as a tax agent.

You can view or update the following contact details with HMRC:
- business name
- business address — this cannot be a PO box address
- phone number
- email