Relative Size Factor (RSF) Audit Test

ISO / ICAI Forensic Standard

Detects potential fraud, errors, or unusual skew: RSF = Highest Value / Second-Highest Value per Customer/Account. Highlights anomalies strictly greater than the threshold (default: > 50).

RSF Threshold:

Select Input File

Supports .xlsx, .xlsm, .xls, .csv

Click to browse or drag & drop file here

Accepts Excel Workbooks and CSV data files

Default reads sheet RSF Input Data or 1st Sheet

Column Mapping & Sheet

Worksheet

Customer / Entity Column

Transaction Value Column

Total Rows

Transactions read

Unique Entities

Distinct accounts

RSF Outliers (> 50)

Flagged for review

Highest RSF Ratio

0.00

Peak skew index

Outlier Max 1 Sum

₹ 0.00

Audit value at stake

RSF Audit Findings

Showing accounts where RSF strictly exceeds threshold

#	Customer / Entity Name ↕	Max 1 (Highest) ↕	Max 2 (2nd Highest) ↕	RSF Ratio ↓	Txn Count ↕	Risk Level
No RSF results yet Upload an Excel/CSV file or click "Load Demo Data" above to run the analysis

Showing 0 of 0 entries

GSTIN Structure & Mod-36 Checksum Validator

Validates standard 15-character Indian Goods and Services Tax Identification Number (GSTIN), extracts state code, PAN number, registration entity code, and verifies the official Luhn Mod-36 checksum algorithm.

Single GSTIN Lookup

Enter 15-Digit GSTIN Number

Batch GSTIN Validator (Paste or CSV)

Paste multiple GSTINs (one per line) or from Excel clipboard:

0 numbers entered

Batch GSTIN Validation Results

#	GSTIN	Status	State	PAN	Remarks

Bank Statement PDF to Excel Converter

Extracts bank transactions (Txn Date, Value Date, Narration, Debit, Credit, Balance) from PDF bank statements using the parsing pattern from bank st code.py.

Upload PDF Statement

Select PDF Bank Statement

No file chosen

Extracted Statement Summary

Total Entries

Total Debits

₹ 0.00

Total Credits

₹ 0.00

Closing Balance

₹ 0.00

Date	Description	Debit (₹)	Credit (₹)	Balance (₹)
No statement transactions extracted yet

ICAI Compliant Tax Invoice Generator

Generates professional, print-ready Tax Invoices with Indian numbering words (Lakhs & Crores) matching the specification of invoice code.py.

Invoice Details

Invoice No.

Invoice Date

Customer / Bill To Name

City

State

Item Details

Quantity

Rate (₹)

Live Tax Invoice Preview

PDF Ready

TAX INVOICE

Original for Recipient

BLR AITT 108

The Institute of Chartered Accountants of India

Vasanthnagar, Bangalore - 560052

GSTIN: 29AAAAA0000A1Z5

Invoice No: INV-2026-001

Dated:

Supplier Ref: DC-8842

Place of Supply: Karnataka (29)

Bill To / Consignee:

AG JOYERIA

Vasanthnagar, Bangalore, Karnataka

Sl.	Description of Services / Goods	Qty	Rate (₹)	Amount (₹)
1	Professional Audit & Advisory Services	1	₹ 75,000.00	₹ 75,000.00
Total Invoice Value				₹ 75,000.00

Amount Chargeable (in words):

INR Seventy Five Thousand Only

E. & O.E.

for BLR AITT 108

Authorised Signatory

Relative Size Factor (RSF) Audit Test

Select Input File

Column Mapping & Sheet

Top 10 RSF Outliers (Ratio)

Max 1 vs Max 2 Value Comparison

RSF Audit Findings

Benford's Law Forensic Analysis

First-Digit Distribution vs Benford Expected

Audit Conformance Verdict

GSTIN Structure & Mod-36 Checksum Validator

Single GSTIN Lookup

Batch GSTIN Validator (Paste or CSV)

Batch GSTIN Validation Results

Bank Statement PDF to Excel Converter

Upload PDF Statement

Extracted Statement Summary

ICAI Compliant Tax Invoice Generator

Invoice Details

Item Details

Live Tax Invoice Preview

TAX INVOICE

PDF to Word / Structured Text Converter

Choose PDF Document

Extracted Document Content

ICAI Question Papers & Suggested Answers Archive