VAT assessment letters: first steps

A VAT assessment letter should be checked against the period, reason, amount and available challenge route. Determine whether it follows a missing return, an enquiry or another issue, because filing a return and appealing a decision may involve different actions.

Reconcile the assessment with the ledger and submitted records. Protect the response deadline while investigating any missing data or adviser handover.

Identify the assessment and the period concerned

Read the complete VAT letter and record the registration number, legal entity, periods, amount and reasons stated. Determine whether it is an assessment, a penalty decision, an information request or a reminder about an existing balance. These documents have different functions. A response prepared for a general enquiry may not protect the position in relation to a formal assessment carrying its own challenge instructions.

HMRC's guidance treats VAT as an indirect tax and explains that a decision letter normally offers a review, with tribunal appeal as another route. ^[1] Keep the letter and enclosures together and identify the date from which the relevant time limit runs. If the document refers to an earlier calculation you have not seen, request it promptly while keeping the current deadline in view.

Reconcile the assessment with VAT records

Obtain the submitted returns and VAT account for every period identified. Compare the assessed figures with sales, purchases, import records and any adjustments relevant to the stated issue. Use a schedule showing HMRC's figure, the reported figure and the difference to investigate. Do not assume that the difference represents one missing invoice; it may involve a classification, timing or reconciliation issue affecting several transactions.

Where the assessment follows a missing return, identify the filing position and obtain advice on the appropriate next action. Where HMRC disputes a treatment, gather the contracts, invoices and evidence supporting it. Keep the original bookkeeping export unchanged and prepare a separate explanatory schedule. A clear reconciliation helps distinguish an arithmetical mistake from disagreement about whether VAT was due or recoverable under the particular facts.

Formulate the specific disagreement

State which part of the assessment is disputed and why, linking each point to the relevant evidence. If you agree with some adjustments, identify them separately. Avoid a blanket denial that leaves the reviewer unable to see the real issue. Where specialist VAT interpretation is needed, obtain it before asserting a legal conclusion based only on how the transaction was described in the accounts.

Check whether the dispute affects other periods or returns and identify that question for the adviser. Do not make unexplained compensating entries in a later VAT return to reverse an assessment. The assessment and any necessary return corrections need to be handled through the applicable processes. Input VAT: evidence to keep provides related guidance on preparing a VAT error review, but it does not replace the challenge requirements of the assessment letter.

Choose the review or appeal route deliberately

For indirect tax decisions, HMRC generally offers a review in the decision letter and gives 30 days to accept it or appeal to the tribunal. ^[1] Confirm the actual instructions and obtain advice if more time or a late application is needed. An informal exchange with the caseworker should not be assumed to preserve every procedural right without the required action being taken.

Keep the choice of route, submission date and supporting grounds in the case record. If a review is requested, track its outcome and any subsequent tribunal deadline. Do not send different versions of the grounds through several channels without coordination. A single approved response and a complete correspondence register make it easier to demonstrate what was challenged and when.

Address payment separately from the merits

The payment position differs between an HMRC review and tribunal proceedings. HMRC's guidance explains that disputed indirect tax is not collected during a review, while tribunal cases generally require payment before the appeal is heard unless the relevant hardship process applies. ^[2] Have the position assessed for the actual case rather than assuming any disagreement automatically suspends collection indefinitely.

Prepare cash-flow information if payment difficulty needs to be raised, but keep it separate from the reasons the assessment is disputed. For assistance reviewing the VAT letter and evidence, see HMRC enquiry response support. Provide the assessment, related calculation, returns and nearest deadline so the scope can address both the substantive VAT issue and the procedural steps that need prompt attention.

At the end of each stage, reconcile the written outcome with the VAT account and any payment made. Record amounts agreed, still disputed or awaiting adjustment. Keep the evidence pack and final calculations even if the matter is resolved through correspondence, because later returns or enquiries may require an explanation of the adjustment and the periods it affected.

Illustrative scenario

A business receives an assessment after a return submission problem. It verifies the filing status and obtains advice on both completing the return and addressing the assessment.

Preparation checklist

• Identify the assessment basis
• Check the affected period
• Verify submission history
• Record the response deadline