Self Assessment

How to authorise Intellitax as your tax agent

Before we can file your tax return or deal with HMRC on your behalf, we need you to authorise us as your agent. It takes around 5 minutes and you only need to do it once.

You will need your Government Gateway login details — your 12-digit user ID and password.

Step 1

Sign in to your HMRC account

Go to gov.uk/log-in-register-hmrc-online-services and sign in with your Government Gateway user ID and password.

Can't find your user ID? Search your email inbox for a message from HMRC — your 12-digit ID will be in there.

🖼 Screenshot — HMRC sign-in screen
Step 2

Select Business tax account

Once signed in, select Business tax account from the menu at the top of the page.

🖼 Screenshot — Business tax account menu
Step 3

Select Manage account

Click Manage account from the menu bar.

🖼 Screenshot — Manage account
Step 4

Select All other tax services

Scroll down to the Manage tax agents section. Click All other tax services.

🖼 Screenshot — Manage tax agents
Step 5

Select Authorise an agent

On the next page, under Agent details, click Authorise an agent.

🖼 Screenshot — Authorise an agent
Step 6

Enter our agent code

Enter the code below exactly as shown and press Next.

Agent code [YOUR CODE]
🖼 Screenshot — Enter agent code
Step 7

Confirm and submit

Check our details are correct, tick the checkbox to confirm, and click Next. That's it — you're done.

🖼 Screenshot — Confirm agent details
Prefer a different approach? No problem — if you'd rather we handle the authorisation another way, just let us know.
Phone
020 3397 9899
>