Signing up for MTD with HMRC: the separate step before you can file

There are two jobs here with almost the same name, and mixing them up is the most common way a first MTD quarter goes wrong. Signing up for Making Tax Digital (MTD) for Income Tax happens on HMRC’s side. Connecting your software to HMRC happens in the software. Doing the second does not do the first.

What does signing up for MTD actually mean?

Signing up is you telling HMRC that this business is joining MTD for Income Tax, for a particular tax year. You do it once, in HMRC’s own online service, signed in with your Government Gateway user ID. Until it’s done, HMRC has no quarterly obligations recorded against you at all, which means there is genuinely nothing for any software to fetch, and nothing to file. More than 570,000 people had signed up by 12 August 2026 (HMRC’s figures (opens in a new tab)), and from September 2026 HMRC begins signing up those who should be in but haven’t done it themselves. HMRC’s instructions are on gov.uk under sign up for Making Tax Digital for Income Tax (opens in a new tab).

What doesn’t count as signing up?

• Being registered for Self Assessment. That’s the old system, most people are already registered for it, and it does not sign you up for MTD.
• Getting a letter from HMRC saying MTD will apply to you. That’s a warning shot, not an enrolment. (A different letter, arriving from September 2026, says HMRC has signed you up itself: what that one means.)
• Filing last January’s tax return. Unrelated.
• Connecting QuarterFile, or any other software, to HMRC. That grants the software permission to act for you: see connecting to HMRC for what that screen does do. It does not enrol you.

What does HMRC ask for when you sign up?

Have your National Insurance number to hand, the date your business or letting started, whether you’re a sole trader, a landlord or both, and which accounting basis you use (cash or traditional). If that last one makes you hesitate, cash basis or traditional accounting explains the difference in a minute, and cash basis is the usual answer. HMRC may also offer you calendar update periods (ending 30 June, 30 September and so on) instead of the standard 6th-to-5th quarters. QuarterFile doesn’t support that election yet, so keep the standard dates, or email support first if you’ve already chosen calendar ones.

Can your accountant sign you up instead?

An agent can sign you up, and many practices are doing it in batches for their clients. Send one email first: “have you signed me up for MTD for Income Tax, or should I?” That stops the same business being signed up twice. If they have, you skip this entirely and go straight to connecting your software. There’s more on dividing the work in MTD if you have an accountant.

How do you check whether you’re signed up?

There is no badge anywhere that says “signed up”, which is a large part of why this catches people. The practical checks, fastest first:

• Ask your accountant, if you have one. Quickest answer available.
• Sign in to your HMRC online account and look for Making Tax Digital for Income Tax alongside your Self Assessment details.
• Connect your software and look at the obligations it fetches. A list of quarters with due dates means you’re signed up. Nothing at all means you very probably aren’t.
• Still can’t tell? HMRC can confirm it directly. Software can’t: no third party sees anything until you grant permission, and even then it only sees obligations, not the sign-up record itself.

How long does the MTD sign-up take?

The sign-up itself is a short online form. What varies is how long HMRC then takes to publish your obligations, and that’s the bit people mistake for a broken connection. Often it’s quick; sometimes it takes a few days; at busy times it can be longer. That gap is normal. What isn’t normal is a week of silence. At that point the thing to re-check is whether the sign-up actually completed, not whether your software is working.

What does an empty list of quarters mean?

If your software tells you HMRC lists no quarterly obligations for this business, it means exactly that: HMRC has nothing recorded, so there is nothing to show you. In rough order of likelihood:

• You aren’t signed up for MTD for Income Tax yet. By a distance the most common cause.
• You signed up very recently and HMRC hasn’t published the obligations yet. Give it a day or two.
• You’re signed up for a different tax year, or a different business, from the one you’re looking at.
• MTD doesn’t apply to you yet and you haven’t joined voluntarily. The two-minute checker tells you which wave you’re in.

An empty list never means your quarters have disappeared: nothing is lost. It is not an all-clear either: waiting is only the right move if you have already signed up.

Can QuarterFile sign you up?

We can’t sign you up. The sign-up lives entirely on HMRC’s side, and no software, recognised or not, can do it on your behalf. What QuarterFile does is everything either side of it: keeping your records digitally from day one, showing you the obligations HMRC returns once you are signed up, and reminding you before each date. Filing opens for the 7 February 2027 quarter.

The order to work in: sign up with HMRC, connect your software, then file your first quarterly update.