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ONE FINAL DECLARATION

One final declaration, however your clients file quarterly

BrightTax handles the MTD for Income Tax final declaration whatever software your clients file with. It retrieves quarterly data directly from HMRC, so there are no compatibility problems, no integration work and no software lock-in. Your clients can keep using the software they prefer (BrightBooks, Xero, Sage, bridging tools or any other MTD software) while you keep complete control at year end.

  1. Your clients’ MTD software

    BrightBooks, Xero, Sage, bridging tools or any other MTD software

  2. HMRC

  3. BrightTax

    One accurate final declaration

  4. Final declaration

    Submitted directly to HMRC

April 2026

Live since 6 April 2026 for qualifying income over £50,000

April 2027NEXT

Income over £30,000

April 2028NEXT

Income over £20,000

For clients mandated from April 2026, the first final declaration covers the 2026/27 tax year.

GUIDED AND ACCURATE

Intelligent checks, reduced risk of errors

Step-by-step prompts and intelligent validation checks guide you through each stage of the final declaration to minimise mistakes. Your team can be confident that each submission is accurate and consistent, with less rework.

FEATURES

MTD final declaration features

Quarterly updates submitted from any MTD software

Your clients can file their quarterly updates through BrightBooks, Sage, Xero, or any other MTD-compatible software. Quarterly updates are cumulative totals, and the final declaration is pre-populated from them, so there’s no manual re-entry of figures.

Complete and submit in one place

Add all your clients’ other income and relief. BrightTax calculates the tax due for comparison with HMRC’s computation and then submits the final declaration directly to HMRC.

Complex clients in one final declaration

BrightTax is designed for complex clients with multiple businesses, UK and foreign property, or mixed income sources including all the Self Assessment supplementary pages (excl. Members of Parliament), pulling all their quarterly updates into one final declaration.

Built by UK tax experts, for accountants

Built by UK tax experts with over 25 years of experience to save you time and support compliance at year end.

VAT, Corporation Tax and dashboard management

BrightTax covers tax compliance beyond MTD for Income Tax. Handle all individuals, partnerships, Corporation Tax and VAT, from one platform, with unified dashboards to manage your whole practice workload.

FAQS

MTD final declaration: frequently asked questions

What is the role of BrightTax in MTD for Income Tax?

BrightTax handles the final declaration, the annual part of MTD for Income Tax. It retrieves clients’ quarterly totals (income and expenses) directly from HMRC, so there’s no re-entering figures already submitted during the year. You complete the remaining sections - employment income, savings and reliefs - and BrightTax calculates the tax due and submits the final declaration directly to HMRC.

What software can my clients use for quarterly filing, and how does it work with BrightTax at year end?

Clients can use any MTD-compatible software for their quarterly updates - Excel (via bridging), BrightBooks, Xero, Sage, FreeAgent or QuickBooks. For the final declaration, BrightTax retrieves that quarterly data directly from HMRC via API, so clients keep the bookkeeping system that works for them, with no forced platform migration or data re-entry.

Is BrightTax designed for specific client types?

BrightTax serves accountants and clients who need to meet the annual final declaration part of MTD for Income Tax, including sole traders and landlords. It also caters for all individuals, partnerships, corporation tax and VAT.

How does BrightTax work with BrightBooks?

BrightBooks and BrightTax cover both parts of MTD for Income Tax: BrightBooks sends quarterly updates for clients who use it, and BrightTax handles the final declaration. BrightTax retrieves quarterly data from HMRC, so the final declaration works the same whichever software sent the updates. Separately, BrightTax AP users can import trial balances from BrightBooks and export journals to it. Use them together or on their own.

Is Bright’s MTD for Income Tax software modular or bundled?

You choose the combination you need: practice management, quarterly updates, final declarations, or all three, to match each client’s needs.

What makes Bright’s MTD software different?

BrightTax works with whatever MTD-compatible software your clients use, because it retrieves quarterly updates from HMRC rather than from their software. Add BrightBooks and BrightManager to cover quarterly updates and practice management as well.

When is the first MTD for Income Tax final declaration due?

MTD for Income Tax started on 6 April 2026. For clients mandated from that date, the first final declaration covers the 2026/27 tax year and can be submitted once it ends on 5 April 2027. The deadline is the 31st of January following the end of the tax year.

Can BrightTax send quarterly updates?

No. Quarterly updates are sent from your clients’ MTD software, such as BrightBooks. BrightTax retrieves them from HMRC for the final declaration.

GET STARTED

See the MTD final declaration in BrightTax

Book a demo to see how BrightTax brings your clients’ quarterly updates together into one final declaration, or talk to our team about your practice’s MTD for Income Tax needs.