How to authorise your accountant for Making Tax Digital

How to let an accountant handle MTD for Income Tax for you, what they can do, and what you still need to do yourself.

4 min read

Quick answer

Your accountant sends you an authorisation request through HMRC. Once you accept it by signing in with your Government Gateway details, they can sign you up for MTD for Income Tax and send your quarterly updates and final declaration. You remain responsible for your records and for meeting deadlines.

How authorisation works

  1. Your accountant sends you an authorisation request from their HMRC agent services account.

  2. You sign in with your Government Gateway user ID and password and accept it.

  3. Your accountant can then act for you for MTD for Income Tax.

What your accountant can do

  • Sign you up for MTD for Income Tax

  • Keep your digital records, or review the records you keep

  • Send your quarterly updates

  • Prepare and submit your final declaration

Main and supporting agents

HMRC lets you have a main agent and supporting agents for MTD for Income Tax. A supporting agent can do some tasks, such as quarterly updates, while your main agent handles the final declaration.

What stays your responsibility

  • Making sure your records are complete and accurate

  • Getting information to your accountant in time

  • Paying your tax on time

  • Any penalties if deadlines are missed

See the questions to ask your accountant.

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Does Making Tax Digital apply to partnerships?

MTD Submission is an independent guide. We’re not HMRC, we’re not part of GOV.UK, and we don’t submit anything on your behalf. The information here is general, was last reviewed in September 2026, and isn’t tax or financial advice. For your own situation, check GOV.UK or speak to an accountant.

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