HMRC Signed You Up for Making Tax Digital 2026/27 — What to Do

If HMRC says it has signed you up for Making Tax Digital for Income Tax (MTD), do not ignore the message and do not assume that the quarterly update is your tax return. HMRC says it is signing up some people who need to use MTD for the 2026/27 tax year but have not enrolled themselves. Your immediate job is to verify the notice, confirm that the qualifying-income test applies to you, choose compatible software and bring your records up to date.

MTD does not replace Self Assessment. You still need to complete the year-end tax return and pay the tax due by the normal deadline. The MTD Calculator→ can help map the reporting cycle, but it cannot determine whether HMRC has applied the correct scope decision to your circumstances.

Why HMRC may have signed you up

HMRC's current guidance says the 2026/27 mandatory phase generally applies where you are an individual in Self Assessment, have qualifying self-employment or property income, and the qualifying income reported for 2024/25 was over £50,000. The threshold is a gross-income test for the relevant sources, not simply taxable profit after expenses.

HMRC began contacting and enrolling some customers from September 2026. That does not mean every sole trader or landlord is automatically in scope. The message may reflect HMRC's records, but you should still check the income year used, the sources included, whether you have stopped trading or letting, and whether an exemption applies.

The later published phases are separate: qualifying income over £30,000 reported for 2025/26 points to the April 2027 phase, while the published £20,000 phase relates to April 2028. Do not use the 2027 threshold to decide whether a 2026/27 sign-up message is correct.

What to do after the sign-up notice

If the notice contains the wrong income source, wrong tax year or a business that has ceased, do not create a new tax position just to match the message. Correct the underlying HMRC record through the route HMRC gives you and keep a copy of the correspondence. An accountant or tax adviser can help where several trades, jointly owned property, overseas income or a change of ownership is involved.

What quarterly updates require

Quarterly updates are cumulative summaries of qualifying business or property income and expenses. They are not a calculation of your final liability and they do not include every item that may appear on the annual return. Compatible software must be used to create and store the relevant digital records and send the update.

For the standard 2026/27 update cycle, HMRC lists these deadlines:

HMRC has said that it will not apply penalty points for late quarterly updates during 2026/27, but the updates remain part of the MTD process. This transitional treatment does not remove late-filing or late-payment rules for the annual tax return.

What MTD does not change

MTD does not turn each quarterly update into a tax bill. You still need to make year-end adjustments, report other income and gains where required, claim reliefs correctly and submit the annual Self Assessment return. The normal tax-payment deadline remains 31 January after the end of the tax year, with payments on account where the ordinary Self Assessment rules apply.

MTD also does not make an expense allowable. Mortgage-finance costs, repairs, travel, home working and mixed-use costs still need to be assessed under the relevant tax rules. The digital record should preserve the evidence; it does not decide the legal treatment.

If you think the sign-up is wrong

Check these points before contacting HMRC:

• Did HMRC use the correct 2024/25 return for the 2026/27 phase?
• Did you combine the relevant property and sole-trader qualifying income correctly?
• Are you looking at gross qualifying income rather than profit after expenses?
• Has the trade or letting activity stopped, changed owner or moved into a company?
• Do digital-exclusion or another approved exemption circumstances apply?
• Is the message genuine and visible in the correct HMRC account?

If the answers do not reconcile, contact HMRC using the official route shown in your account or notice. Keep the notice, tax return, income calculation and any evidence that the activity ceased or changed. Do not rely on a social-media summary or pay a software provider before confirming what reporting duty actually applies.

Digital records, software and corrections

The practical MTD obligation begins with a reliable digital record, not with a particular brand of software. The software should let you keep the underlying income and expense records, connect to HMRC where required and submit the relevant update. A spreadsheet alone may not meet the full process if it cannot use compatible bridging or submission functionality. Confirm the product's HMRC compatibility and the tax sources it supports before signing a contract; a provider's marketing claim is not the same as HMRC approval for your specific workflow.

Keep a clear audit trail from bank transaction or invoice to the quarterly figures. Record the date, amount, category, business or property source, VAT treatment where relevant and any private-use split. Do not move personal spending into a business category simply because the software offers a convenient button. MTD sends data; it does not make an expense allowable or remove the need to retain evidence under the normal tax record rules.

If a quarterly update contains an error, correct the digital records and follow the current HMRC process for amending or replacing the update. Do not submit a second update for a different period merely to cancel the first one unless the software and HMRC instructions say to do so. Keep a note explaining the correction, the date made and the effect on the cumulative figures. Year-end adjustments, capital allowances, finance-cost restrictions and relief claims belong in the annual finalisation, where the applicable rules require them.

Exemptions and changing circumstances

Digital exclusion is not the only possible reason an exemption may be relevant. HMRC's exemption route may consider a person's ability to use digital tools, age, personal circumstances or other published conditions. An exemption is not automatic because software is expensive or inconvenient. Apply through the official route and retain the decision. If circumstances change, review whether the exemption continues rather than assuming it lasts for every future tax year.

A change in ownership or activity also needs a reporting decision. Moving a trade into a company, transferring a jointly owned property, stopping a letting or starting a second source can alter the income that belongs in the MTD account. The old records still support the final Self Assessment return, and a cessation does not erase an outstanding return or tax payment. Notify HMRC with the date and evidence of the change, then follow the account's instructions for any final update.

The annual return remains the reconciliation point. Compare the quarterly totals with the final accounts, add non-MTD income and gains, apply reliefs and adjustments, and check that payments on account are based on the final liability. If a quarterly figure was provisional, keep the calculation showing why it changed at year end. This makes the MTD record useful without pretending that a quarterly update is a final tax assessment.

Keep the notice and the account screenshot showing the start date, but do not expose personal identifiers when sharing them with a software provider. Check that any agent authorisation covers the correct tax service and that access is removed when the agent or provider stops acting.

At each quarter end, reconcile the update before submission and save the confirmation. A missing update can be investigated much more quickly when the source records, software period and HMRC receipt are together.

If a submission fails, record the error, retry through the official software route and retain the successful receipt rather than relying on memory. Escalate repeated failures before the deadline. Record it.

A Practical Decision Tree After the Notice

Start with the notice rather than with the software. Write down the account holder, the start date, the tax year used for the income test and every source HMRC has listed. A sole trader with two trades, or a landlord with UK and overseas property, should not assume that one source can be omitted because the sign-up message highlights another. The records need to explain how the figures were separated and then how they were brought together for the annual return.

If an agent or bookkeeping provider is helping, confirm which authorisation they hold and which software account is connected. MTD access is not a substitute for checking the underlying return, and granting software access does not make the provider responsible for facts they have not been given. Keep copies of the notice, the income test, the exemption decision if relevant, and each submission receipt. Remove access when the relationship ends and do not share personal sign-in details outside the HMRC process.

The end-of-year check should be planned before the first update is sent. Mark transactions that need a year-end adjustment, private-use apportionment, capital treatment or a relief claim, and keep them out of a simple quarterly estimate where the rules require finalisation later. When the annual return is prepared, reconcile opening and closing records, cumulative update totals, other income, adjustments and payments already made. A difference is not automatically an error: it may reflect a correction or an item that belongs only in finalisation. The explanation and supporting evidence are what make the difference reviewable.

Frequently Asked Questions

Use the MTD Calculator→ to map the quarterly cycle, then compare your case with the MTD 2026/27 overview, the MTD landlord guide and the MTD penalties guide. Always verify the live position in your HMRC account and current GOV.UK guidance before submitting records.

Official sources

• HMRC: Check what to do if HMRC has signed you up for MTD for Income Tax
• HMRC: 436,000 sole traders and landlords make their tax digital
• HMRC: Find out if and when you need to use MTD for Income Tax
• HMRC: MTD for Income Tax quarterly updates
• HMRC: Exemptions from MTD for Income Tax