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MTD - HMRC Compliant Module · How-to guide

Understand Accounting as the MTD source of truth

Follow this guide to use Britixo Accounting & Bookkeeping as the authoritative ledger; the MTD module must not become a second ledger. The guide then takes you through the correct route, the checks to complete before making changes, the workflow in order, and the evidence to review afterwards.

Audience: Finance managers, accountants and MTD implementation staffModule v1.0.0Code-backed
Jump to steps
Where to goTax Centre → Overview / VAT / Income Tax
Before you startRequired access: MTD view/prepare plus Accounting access appropriate to the source records. Work on the correct tenant and taxpayer profile. Reconcile the underlying Accounting & Bookkeeping records before relying on prepared tax totals.

What you’ll accomplish

Use Britixo Accounting & Bookkeeping as the authoritative ledger; the MTD module must not become a second ledger. The MTD module stores tax profiles, HMRC authority, obligations, frozen filing snapshots, approvals and audit evidence, while Accounting remains the primary financial record system.

Follow these steps

  1. Go to Tax Centre → Overview / VAT / Income Tax.
  2. Verify you are working on the correct taxpayer profile and tenant before you understand accounting as the mtd source of truth.
  3. Follow the on-screen workflow for understand accounting as the mtd source of truth and keep the underlying Accounting records unchanged unless a genuine bookkeeping correction is required.
  4. Check any blocker or warning before continuing; a blocker must not be bypassed by manually re-keying tax totals.
  5. Keep client approval, professional review and HMRC authority requirements separate and complete each one that applies to the filing mode.
  6. Use the Audit Trail and frozen snapshot details to verify what was prepared, approved and submitted.

Checks before you continue

Taxpayer profileAlways verify the correct profile, tax regime and masked identifiers before preparing or submitting.
Tenant contextTax records, HMRC authority and audit history must stay inside the current Britixo tenant/runtime.
Accounting sourceSource tax figures must come through the verified Accounting digital-link adapter with transaction lineage.
Approval stateThe exact frozen snapshot must carry the approvals required by its filing mode before HMRC submission.

Technical basis for this guidance

This guide was checked against libraries/Mtd_accounting_adapter.php; libraries/Mtd_tax_compliance_engine.php; docs/ACCOUNTING_ADAPTER_CONTRACT.md. The user instructions describe only behaviour exposed or enforced by the supplied module. Internal secrets, encrypted token values and database identifiers are intentionally not shown to ordinary users.

Compliance and operational boundaries

  • Britixo Accounting & Bookkeeping remains the authoritative ledger; the MTD module is a tax preparation/submission layer.
  • Government Gateway usernames and passwords must never be entered into or stored by Britixo.
  • A tax filing must not proceed when transaction-level digital lineage cannot be proven.
Accounting interlinkFor transaction creation, tax mappings, banking, reconciliation, journals, reports and source-document corrections, use the Accounting & Bookkeeping Help Centre. Correct the bookkeeping source first; do not type replacement totals into MTD merely to clear an error.
Accounting & BookkeepingOpen related guidanceAll MTD - HMRC Compliant guidesOpen related guidanceMapping topicOpen related guidanceReconciliation topicOpen related guidance