Authorising an agent to deal with your tax affairs
Check what a paid agent can do on your behalf. How you authorise the agent depends on the tax, and you may need to use paper form 64-8 or an online service.
Read the full page on GOV.UK for the details.
Source
This note summarises a GOV.UK page and was reviewed by a person before it was published. GOV.UK is the authority: check the page before you act.
Authorising an agent to deal with your tax affairs (updated 6 October 2026)