Making Tax Digital, Declassified: What Every Sole Trader Must Know for April 2026

The Making Tax Digital rules for Income Tax take effect from 2026-04-06. The Agency has reviewed them so that operatives don't have to. We recommend paying attention regardless.

For years, the handlers who run pet-care operations — the dog-walkers, the boarders, the daycare handlers — kept their books in a shoebox and their tax return in a single, dreaded April evening. HM Revenue & Customs has decided this era is over. What follows is the Agency's plain-English brief on what changes, who it touches, and what the platform these handlers already use has quietly been preparing.

What Making Tax Digital actually is

Making Tax Digital (MTD) is HMRC's requirement that tax is kept and filed digitally, through approved software, rather than typed once a year into a website. Two parts matter to a pet-care business:

- MTD for VAT — already in force for VAT-registered businesses. - MTD for Income Tax (ITSA) — the new one, for self-employed sole traders.

The headline change for ITSA: instead of one annual Self Assessment, you send HMRC a short update every quarter, and then a Final Declaration once a year to confirm the whole picture. Your records must be kept digitally throughout — no more reconstructing the year from a carrier bag of receipts.

Who it affects, and when

- Sole traders with qualifying income over £50,000 must comply from 6 April 2026. The threshold drops to £30,000 in April 2027, and £20,000 the year after. Most established dog-walking and boarding rounds cross these lines. - Limited companies are not in scope for MTD for Income Tax — they file Corporation Tax — but a VAT-registered Ltd is already inside MTD for VAT. - Below the threshold, you are not mandated yet. The Agency's position: the habits are worth forming early regardless.

What it means in practice

Three obligations, all digital:

1. Keep digital records of income and expenses as you go. 2. Send quarterly updates to HMRC — a running total, four times a year. 3. File a Final Declaration after the year end, confirming the figures and any adjustments.

Miss the software requirement and you are non-compliant even if your sums are perfect. This is the part that sends most handlers looking for a second product to bolt on. The Agency has observed that they may not need to.

The Agency's finding: it is being built into the software

The platform these handlers use to run bookings, walks and invoices already keeps the digital records, and is being built to file directly with HMRC — Income Tax and VAT — without leaving it. It cannot do so yet. That waits on HMRC. We sent a field agent in to photograph the department. The images below are declassified, and they are a preview.

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Income Tax Returns — your quarterly updates and the whole year, in one place. No spreadsheets, no separate software.

Note the last frame in particular. HMRC's Final Declaration statement is shown in full, and the control to file it stays disabled until the handler confirms they have read and agree. The Agency approves of software that refuses to file a tax return on a human's behalf without the human's word.

What is being prepared

Behind the screens above, the platform has completed HMRC's sandbox testing across every in-scope endpoint — quarterly updates, the annual calculation, the Business Source Adjustable Summary, and the Final Declaration itself — and HMRC has accepted its Production Approvals Checklist. Fraud-prevention headers accompany every call, and they are the one item still under review, with HMRC's specialist team; the integration is checked weekly against HMRC's live specifications so it cannot drift out of date. In short: the plumbing is built and tested. The door to HMRC production has not yet been opened, and until it is, no live return can be filed from here.

The Agency's guidance is unglamorous but firm: keep your records as you go, know your threshold, and use software that talks to HMRC directly. Do that, and the dreaded April evening becomes four quiet quarterly taps and a single, considered declaration.

Filed under: MTD ITSA. Nine Lives, Deputy Director.