Case study · Our own product
TiraTax, built for two April 2026 deadlines.
Our own software for Making Tax Digital: Income Tax, VAT and Corporation Tax from one set of books, with payroll. It is in early access by invitation, and every filing runs against HMRC’s test service or is switched off today.
Two deadlines, both needing new software.
April 2026 brought two changes to UK tax compliance. Both need software: the free filing route went, and the alternatives were large accounting suites or bridging tools.
Suites such as Xero, QuickBooks and Sage carry inventory, project and multi-currency features most sole traders and small companies never use, at prices that reflect that scope. Bridging tools meet the MTD requirement but leave the bookkeeping and categorisation to the user. Practices with clients under both regimes were stitching products together or tracking deadlines in spreadsheets. We built TiraTax to close those gaps.
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Making Tax Digital for Income Tax
From April 2026, sole traders and landlords earning over £50,000 must send quarterly digital updates to HMRC; the threshold falls to £30,000 in 2027 and £20,000 in 2028. Each year brings four quarterly updates, an annual submission and a final declaration, all through MTD-compatible software.
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Corporation Tax after CATO
HMRC’s free Company Accounts and Tax Online (CATO) portal closed permanently on 31 March 2026. Every limited company (around 4.9 million in the UK) that relied on it for the annual CT600 now needs commercial software. The filing itself is unchanged, the same CT600 in iXBRL format; only the free channel went.
What we built.
Early access by invitation
TiraTax covers the whole path in one app: documents in, figures confirmed, books kept, returns prepared, and client management for practices. It is UK-hosted, works for many clients at once, and connects to 17 HMRC APIs across more than 60 endpoints.
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Upload
Receipts, invoices and bank statements as a photo, PDF, CSV or Excel file, from a phone, by email or in the browser.
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Read
Each line item is read and a category suggested, for the user to confirm.
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Keep the books
Income and expenses kept up to date, feeding the tax calculations directly.
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Submit
A quarterly update, VAT return or final declaration, with a full audit trail, sent to HMRC’s test service. CT600 filing is switched off today.
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Income Tax (MTD ITSA)
Quarterly updates for self-employment, UK property and foreign property; the annual submission with capital allowances; the final declaration with HMRC’s tax calculation; amendments to submitted periods; and 15 additional income sources such as interest, dividends, pensions and capital gains.
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Corporation Tax (CT600)
Built to do what CATO did: the full CT600 computation with iXBRL accounts, PDF export for client records and an archive of past filings for companies moving from CATO. Filing is switched off today.
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VAT
The nine-box return prepared from the books, with VAT obligations and deadlines tracked, and a submission history and audit trail.
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PAYE payroll
Pay runs with PDF payslips, statutory pay and pensions auto-enrolment, and RTI submissions to HMRC’s test service, in the same app.
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Bookkeeping
Income and expense tracking built in and feeding the tax calculations, so no separate bookkeeping tool is needed.
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Practice management and reminders
Accountants see their whole client list on one dashboard: obligations, document collection and filing status. Clients get deadline reminders and can reply with attachments that go straight into their account.
Built against HMRC’s feature list.
HMRC publishes the software features and income sources that MTD for Income Tax software can support. TiraTax implements all ten software features, all three business types (self-employment, UK property and foreign property) and 15 of the 16 additional income sources; the exception is partnership income, where HMRC’s API is pending.
10/10 software features in HMRC’s MTD ITSA comparison table, implemented and tested
| Feature | What it covers |
|---|---|
| Record keeping | Transactions, document reading, double-entry bookkeeping |
| Bridging software | CSV and Excel import with automatic column detection |
| Submit quarterly update | Cumulative from 2025–26 onwards |
| Submit annual update | Capital allowances, trading income allowance |
| View tax calculation | Income Tax, National Insurance, total liability |
| Make a final declaration | The full finalisation workflow |
| View previously submitted updates | — |
| Amend quarterly update | — |
| Amend annual update | — |
| Claim to reduce payments on account | — |
17 HMRC APIs, more than 60 endpoints
- Business Source Adjustable Summary (BSAS)
- Business Details
- Individual Calculations
- Obligations
- Self-Employment Business
- Property Business
- Savings Accounts
- Dividends Income
- Pensions Income
- State Benefits
- Other Income
- Employments
- Foreign Income
- Insurance Policies
- CGT Residential Property
- Reliefs
- Deductions
Where it stands.
Who it is for
- Sole traders
- Upload documents from a phone and review the figures read from them.
- Landlords
- UK property income in the quarterly updates alongside any self-employment income, in one app.
- Companies
- The CT600 with the iXBRL output CATO produced. Filing is switched off today.
- Practices
- Clients’ ITSA and CT600 obligations tracked on one dashboard, with automated document collection.
TiraTax is in early access by invitation. Each filing runs against HMRC’s test service or is switched off today; Corporation Tax filing is switched off. VAT, Income Tax, Corporation Tax and payroll filings have each been recorded end to end against HMRC’s test services with test data.
The build shows what a dedicated HMRC integration takes: 17 APIs and more than 60 endpoints, every software feature in HMRC’s MTD feature list, and practice management alongside filing. It is a full platform, not a bridging tool.
MTD ITSA, CT600 and VAT sit in one app, designed to replace three or four separate tools. A practice that tracked client deadlines in a spreadsheet and kept separate products for CT600 and ITSA can work from one screen, with automated document collection reducing the manual intake for each client.
Need software for Making Tax Digital? We will walk through your obligations and show you how TiraTax handles them.
contact@tiraverse.co.uk