Preparing records for an HMRC enquiry

Records for an HMRC enquiry should be organised around the issues and periods actually under review. Build an index connecting return figures to source evidence and distinguish original records from later explanations or reconstructed schedules.

Identify missing items early and request replacements where possible. Do not alter documents to conceal a gap or make an unsupported figure appear contemporaneous.

Turn the enquiry questions into a document map

Create a table with one row for each question HMRC has raised. Include the tax period, figure or transaction concerned, the records needed and the person responsible for locating them. HMRC may check accounts, tax calculations and several kinds of returns, so the evidence should match the particular scope communicated in the enquiry. ^[1] Avoid building a generic archive that leaves the reviewer to guess which document answers which question.

For each return figure, identify the calculation or schedule that produced it and then the underlying records. This creates a chain from the submitted number to the evidence rather than a collection of unrelated invoices. Where several transactions support one total, provide a reconciliation and document references. Keep the arithmetic visible so the recipient can check the sum without re-entering every line into a separate spreadsheet.

Preserve originals and explain later working papers

Keep an untouched copy of source files, including spreadsheets with relevant formulas and original document exports. Create separate working copies for annotation or reconciliation. If a schedule is prepared after the enquiry began, date it and explain that it is a later summary of underlying records. Do not present it as a document created at the time of the transaction merely because it helps explain the original return.

When reconstructing missing information, record the sources used and the limitations. A replacement supplier invoice, bank entry and correspondence may together clarify an expense, but the reconstruction should still be described honestly. HMRC's information-notice guidance addresses inaccurate information and the preservation of requested documents. ^[2] The evidence process must therefore prioritise accuracy and traceability rather than making every file appear complete at any cost.

Reconcile the financial records before packaging them

Compare ledger totals with accounts, submitted returns and relevant bank or platform statements. Investigate differences such as timing adjustments, net settlements, refunds or amounts posted to the wrong period. Keep a short explanation for each reconciliation item and attach the supporting record. An unexplained mismatch can create additional questions even when the underlying treatment is supportable once the records are understood.

Use consistent labels for gross amounts, tax, net amounts and currency. If an exported report uses a different accounting period from the return, explain how the relevant transactions were selected. For multi-year enquiries, keep each year's figures separate and show any opening balances carried forward. Do not force a reconciliation by inserting a balancing figure without identifying the transaction or adjustment it represents.

Handle scope and sensitive material through review

Some records may contain personal information about employees, customers or other taxpayers, or communications requiring legal review. Identify these documents before sending and ask the adviser how the request applies. HMRC's formal information-notice guidance explains that limitations and appeal rights can be complex. ^[2] Do not assume that a confidentiality label alone permits withholding a required record, or that every adviser email has legal privilege.

If the requested period or category is unclear, seek clarification with enough detail for HMRC to understand the question. Keep any agreement about scope or delivery in writing. Responding to a request for tax information explains how to assess a request for tax information. Meanwhile, continue locating clearly relevant material so an unresolved issue concerning one document does not prevent sensible preparation of the rest of the response.

Produce an indexed pack that can be followed

Give each document a stable reference and arrange the pack in the order of the response questions. Use a covering schedule showing the filename, date, short description and question answered. Check that scans are readable, pages are complete and spreadsheet exports include the information needed to understand the figures. Remove accidental duplicate working versions while preserving the underlying originals in the internal case file.

For support preparing and reviewing the evidence pack, see HMRC enquiry response support. Describe the enquiry scope, record formats and known gaps so the work can be planned proportionately. Before submission, have the factual owner review the explanations and confirm the exact package being sent. Retain that package with delivery evidence, rather than relying on a folder whose contents may change after the response leaves the organisation.

Maintain a separate outstanding-items list with the reason each item is missing, the action taken and any agreed delivery date. Update it when replacements arrive and link them to the original request. This provides a clear continuation record if HMRC asks a follow-up question or another adviser takes over the enquiry later.

Illustrative scenario

A sole trader is asked about business expenses. Their pack links each queried category to invoices, payment evidence and a short business-purpose explanation, with missing documents openly identified.

Preparation checklist

• Map records to questions
• Index source documents
• Explain reconstructions
• Track missing evidence