Mandatory Tax Adviser Registration: HMRC Updates

June 4, 2026

Solicitors

Amanda Perroton

Hands typing on a laptop with digital interface overlays, symbolising HMRC tax adviser registration, online compliance systems, digital submissions, regulatory administration and modern tax reporting processes.

HMRC have been busy this week.  Updates to the Manual on ‘Mandatory Tax Adviser Registration’ were published on 1st June 2026.

(a) In MTAR10100 is confirmation that making payments to HMRC on behalf of a client counts as “interaction with HMRC” (so conveyancers will need to register, despite what some of the outsourcing firms had said).

(b) In MTAR20400 is guidance on who are the “relevant individuals” who will need to be named on the application.

Here is the link for MTAR10000 https://www.gov.uk/hmrc-internal-manuals/mandatory-tax-adviser-registration/mtar10000.

My colleague John Shallcross was aware that they had made a video but this appears to have been canned.  Juliet Shaw has written an article for Today’s Conveyancer which provides this helpful note:

"………some businesses have been unsure which Government Gateway credentials to use during the registration process:

(a) Businesses should apply for an Agent Service Account using their business Government Gateway credentials.

(b) When a sole trader is asked to complete information about who they are as relevant individuals within the business, they should provide their personal details.

(c) They will then need to log into their personal Government Gateway account, as they will receive a link to confirm their individual details."

Just a short, but important, update from me today but please email me on amanda@bhptax.law should you have any questions, or email Freya in the office on freya@bhptax for any SDLT cases you would like our assistance with.

Start your enquiry

Read More

Close-up of house keys and a miniature property model resting on conveyancing paperwork, symbolising residential property transactions, home purchases, SDLT filings, conveyancing services and property completion processes.

Why It’s Time to Reconsider Fixed-Percentage Fees in Conveyancing

November 24, 2025
Solicitors
Why the current low fixed-fee conveyancing model is becoming increasingly unsustainable, unsafe and incompatible with the growing complexity of SDLT and regulatory risk.
Read  More
Split image showing a rural house on one side and farmland with agricultural buildings on the other.

SDLT: Common pitfalls

October 29, 2025
SDLT
Back when stamp duty applied to the acquisition of residential property, things were far more straightforward. The rate was a fixed percentage based on the property’s value band, and few worried about the distinction between residential and non-residential or mixed-use property—except when claiming the now-defunct disadvantaged areas relief.
Read  More

Let's work together!

Whether you need advice on a specific matter or wish to discuss how we can support your business or personal needs, we're here to help.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.