Audit Sampling and Vouching from Invoices

• Audit Partner
• Audit Manager
• Audit Senior
• Head of Internal Audit

In statutory, tax and internal audits, teams pick samples from the purchase, sales and expense ledgers and vouch each entry against invoices, GRNs, purchase orders and bank payments. The client sends documents in batches over email and WhatsApp, and the working paper that records what was checked is often assembled at the end from memory.

We build a vouching assistant that takes the ledger export from Tally, SAP or Zoho Books, checks the population against the trial balance and helps the engagement team pick samples by a documented method: monetary unit, stratified, random with a recorded seed, or key items above a threshold. For each sampled entry it reads the invoice, purchase order, GRN and bank debit, extracts the attributes your audit programme requires and compares them with the ledger. Matches, mismatches and missing documents land in a vouching sheet with links to the source page, and the audit senior clears or escalates each exception.

• Sample selection by monetary unit, stratified, random-with-seed or key-item rules, with parameters recorded
• Reads tax invoices, purchase orders, GRNs, delivery challans and bank advices, including phone photos
• Attribute tests per audit programme: party, GSTIN, invoice date against booking period, amounts, tax rate, approval
• Cut-off checks for entries booked around the period end
• Pending-document list generated for each client contact
• Vouching sheet export in the firm's working paper format with source-page links

1. 01Import the ledger and set the populationThe ledger export is loaded and its totals are agreed to the trial balance before anything is sampled.
2. 02Select samplesThe senior chooses the method and parameters; the tool draws the sample and records the seed and criteria.
3. 03Collect supporting documentsClient uploads are mapped to sampled entries, and a pending list goes back to the client for anything missing.
4. 04Extract and compare attributesOCR and an LLM read each document and compare the required attributes with the ledger entry.
5. 05Review exceptionsMismatches and low-confidence attributes go to the audit senior, who clears, escalates or requests more evidence.
6. 06Produce the working paperThe vouching sheet, selection log and reviewer actions are exported to the engagement file.

1. Data intake
   • Ledger and trial balance import from Tally, SAP or Zoho Books
   • Client document upload portal
   • Email and WhatsApp document drop
2. Sampling
   • Population check against trial balance
   • Sampling engine with monetary unit, stratified and random methods
   • Selection log with seed and parameters
3. Document understanding
   • OCR with layout detection
   • Classifier for invoices, POs, GRNs and bank advices
   • LLM attribute extractor with schemas
4. Testing and review
   • Attribute comparison and cut-off rules
   • Senior review screen with source highlights
5. Working papers
   • Vouching sheet export
   • Audit trail of reviewer actions

The audit senior approves the sampling method and parameters before selection and clears every exception. The engagement manager reviews the working paper; the tool records evidence and never forms the audit conclusion.

• Tally Prime, SAP or Zoho Books exports (Excel, XML or API)
• Audit working paper software or the firm's Excel templates
• Google Drive or SharePoint client folders
• Email and WhatsApp Business API for document requests

• Population totals agreed to the trial balance before sampling
• Selection parameters and seed logged so the sample can be re-performed
• No exception is cleared without a named reviewer
• Every attribute linked to its source page
• Client data segregated by engagement with role-based access

• Designed to help engagement teams document sampling and evidence in line with ICAI Standards on Auditing such as SA 230, SA 500 and SA 530.
• The engagement team remains responsible for evaluating evidence and forming the audit opinion.

• Accounting, Audit & Consulting

  Bank and Ledger Reconciliation

  Match bank statements in any format against the cash book or ledger, explain unmatched items and produce a BRS the reviewer can tick through, with ambiguous matches held for a person.

• Accounting, Audit & Consulting

  GST Return Reconciliation (GSTR-2B vs Books)

  Match GSTR-2B and 2A data against the purchase register invoice by invoice, find ITC at risk before GSTR-3B is filed, and draft supplier follow-ups for approval.

• Accounting, Audit & Consulting

  Forensic Review of Expense Claims

  Review every expense claim, not a sample: read the receipts, check them against travel, leave and policy data, and rank suspicious patterns for forensic investigators.

• Accounting, Audit & Consulting

  Client Document Collection and Follow-Up Agent

  A WhatsApp and email agent that sends each client their pending-document list, recognises what they upload, follows up on schedule and shows the team exactly what is still missing.