Skip to main content
Form

Tax credits: allow someone to help you with your award (TC689)

Use form TC689 to authorise someone (an 'intermediary') to help you with your tax credits.

Updates to this page

From:
HM Revenue & Customs
Published:
12 June 2014
Last updated:
11 April 2025
Show all updates

  1. After an intermediary has been authorised they cannot make changes to your bank details or address for your claims on your behalf.

  2. The TC689 form has been updated.

  3. English and Welsh version of TC689 PDF and online form updated for use from 6 April 2020.

  4. English and Welsh version of TC689 PDF and online form updated.

  5. The details section has been updated with what changes an intermediary can make to your tax credits and Child Benefit claims.

  6. A pdf version of form TC689 has been added to the page for intermediaries to use if a printed version is needed to complete with clients, for example during a home visit.

  7. Welsh translation added.

  8. First published.

Documents

TC689: Tax credits Authority for an intermediary to help you with your tax credits

PDF, 310 KB, 2 pages

This file may not be suitable for users of assistive technology.

Request an accessible format
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email different.format@hmrc.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

If you want someone to help you with Child Benefit use form CH105.

Use form TC689 if you want an intermediary, such as Citizens Advice, to help you with your tax credits.

Do not use form TC689 to authorise a paid agent such as an accountant or other professional adviser to help you with your tax credits. You should use form 64-8 instead.

Email HMRC to ask for the form in Welsh.

Dealing with tax credits for someone else
Guidance on how to deal with the Tax Credit Office for someone else.

Tax agents and advisers: authorising your agent (64-8)
Use form 64-8 to authorise HMRC to communicate with an accountant, tax agent or adviser acting on your behalf.

Sign up for emails or print this page

Related content