Making Tax Digital · Sole traders
MTD deadline day: what to check before you finish
ONLY£15A MONTHOn deadline day, the essential outcome is a reviewed update sent for the correct business and a confirmed response.
On deadline day, the essential outcome is a reviewed update sent for the correct business and a confirmed response. The filing deadline is not the same as a permanent closure of HMRC's submission service. If you miss it, outstanding work still needs completing.
Confirm the update you are sending
Check the tax year, business and reporting period. For the first standard 2026/27 update, the period was 6 April to 5 July and the deadline was 7 August 2026. Calendar users had a different cut-off but the same deadline.
Review the source coverage and category totals. Identify any remaining transaction error rather than submitting an unsupported balancing figure. If an agent is involved, confirm who has authority to send and whether the required approval is recorded.
Leave time to verify acceptance
Use the supported submission route and read the response. If there is an error, retain the details and follow the current recovery instructions. If the outcome is uncertain, verify status rather than assuming success because the button was pressed.
Do not plan around a claim that the gateway “shuts down” at midnight. A deadline determines timeliness; it does not mean late reporting ceases to be possible or required.
Worked example: the wrong business selected
A person has a sole trade and a UK property business. The software opens the recently used trade record, but the outstanding update is for property. Checking the business before submission prevents the user from mistaking the trade's completed status for full compliance.
The final review compares accepted outcomes with every relevant obligation. A single success message cannot answer that wider question.
A review that checks more than the total
Start with coverage: the correct person, business and period, plus all relevant accounts and cash records. Then look at completeness. A feed can be connected today while still missing an earlier week. Confirm the earliest and latest transactions against the source.
Next, inspect unusual items. Large transfers, loan receipts, refunds, net settlements and private purchases often need more context than a bank description provides. Check for duplicate imports where a statement overlaps a live feed. An automatic warning is useful evidence to investigate, not proof that the entry must be removed.
Finally, review category totals. A category unexpectedly showing zero, a large increase or a negative amount deserves an explanation. You do not have to make every annual tax adjustment at this stage, but you should understand the records behind the summary you approve.
HMRC explains what quarterly updates contain. Keep the approved version and the resulting acknowledgement together. If something later changes, correct the source record and use the software's supported update process so you can explain which figures are current.
Understand the first-year concession
HMRC states that there are no penalties for missing quarterly-update deadlines for the 2026/27 tax year. That concession does not remove the digital-record or quarterly-reporting obligations, and it does not make all tax returns and payments penalty-free. Read the precise penalty guidance.
Outstanding quarterly reporting must be dealt with before completing the relevant annual return. However, a missed August 2026 update should not be described as an automatic penalty on the separate 2025/26 return due in January 2027. The 2026/27 annual-return deadline is January 2028.
After the first-year concession, the points rules apply to missed quarterly deadlines as described by HMRC. Do not assume that multiple businesses create multiple points at the same deadline. Annual-return rules, late-payment penalties and interest require their own checks.
If you have fallen behind, establish what is outstanding and work through the supported catch-up process. Keep evidence of technical problems and contact the appropriate support team with the business, period and error details. The useful next step is a complete record and an accepted update, rather than guessing what a generic warning might mean.
Keep the reporting dates separate from payment dates
The standard first update for 2026/27 covers 6 April to 5 July 2026 and was due by 7 August 2026. The second covers 6 April to 5 October 2026 and is due by 7 November 2026. The third and fourth deadlines are 7 February 2027 and 7 May 2027. These are cumulative updates, not four isolated sets of three-month totals.
Calendar periods have different cut-offs and the same filing deadlines. Check the setting for each business rather than assuming the dates from a bank statement. HMRC lists both reporting calendars.
The annual return for 2026/27 is due by 31 January 2028. The earlier 2025/26 return normally remains due online by 31 January 2027. Keeping those years distinct avoids a common transition-year misunderstanding.
Payments on account, where required, follow their own January and July timetable. An update acknowledgement confirms a reporting event; it does not confirm that an outstanding tax bill has been paid. Check your actual HMRC account and payment obligations separately from the software's progress indicators.
Save the evidence and the next task
Retain the accepted result with the approved summary. If unresolved or late, record the issue and continue through the catch-up process. Set the next review date and keep tax-payment obligations separate from the act of quarterly reporting.
Take the next step
Avona.app offers a self-service route from £15/month. Bring your records together, review the figures and choose a workflow that fits your business. For professional help, discuss the scope and total price of Avona Concierge, managed by chartered accountants, before choosing a service.