How Accountants Analyse Financial Data Before Filing

The Pre-Filing Review Process

Before submitting a tax return, accounting professionals conduct a structured review of the client's financial data. This process — often called pre-filing analysis — is designed to catch errors, identify risks, and ensure the filing accurately reflects the client's financial position.

The quality of this review directly impacts filing accuracy, regulatory compliance, and the accountant's professional liability. Yet for many firms, this remains a manual, time-intensive process.

Step 1: Source Document Collection

The first step is gathering all relevant financial documents from the client. For most individual and SME clients, the primary source is bank statements — typically 12 months of transaction history covering the assessment year. Additional documents include GST return filings (GSTR-1, GSTR-3B), TDS certificates (Form 16/16A), investment statements, and accounting software exports.

Step 2: Transaction Extraction

Bank statements arrive as PDFs in varying formats. Each bank uses different column layouts, date conventions, and amount formatting. The accountant must extract each transaction — date, description, debit amount, credit amount, and running balance — into a workable format.

This is where automation provides the highest impact. Tools like Prefiler's bank statement analysis automate extraction across multiple bank formats using structured layout profiles.

Step 3: Transaction Classification

Each extracted transaction must be classified: Is it income or expense? Business or personal? A one-time receipt or recurring? Does it relate to GST-applicable supplies? Classification determines how the transaction is reported and which regulatory rules apply.

AI-assisted classification uses pattern detection to categorise transactions based on narration text, amount patterns, and counterparty identification. This significantly reduces manual categorisation effort while maintaining accuracy through confidence scoring.

Step 4: Risk Identification

The accountant reviews the classified data for compliance risks: unreported income sources, transaction concentration with single counterparties, regulatory threshold breaches (such as cash transaction limits), and inconsistencies between reported and actual financial activity.

Deterministic risk scoring frameworks — like Prefiler's materiality-weighted methodology — systematise this review, ensuring consistent risk identification across all clients.

Step 5: Filing Preparation

With risks identified and transactions classified, the accountant prepares the filing documentation: income computation, deduction verification, tax liability calculation, and supporting schedules. The pre-filing analysis report serves as the foundation for these calculations.

See how Prefiler implements this workflow: pre-filing analysis software, AI tools for accountants.