Invoice Processing Tool

GST-Compliant Bills in Zoho Books with an AI-Assisted Review Workflow

Industries

Finance & Accounting Operations

Platforms

Web Application with REST APIs

GST-Compliant Bills in Zoho Books with an AI-Assisted Review Workflow

Client Overview

Our client runs accounts payable in India, where every bill has to stand up to GST rules. Invoices arrived as PDFs and images, and someone had to read each one and retype it into the accounting system before it became a bill.

That data entry was the bottleneck. Tax treatment varied by invoice, vendors were recorded inconsistently, and nobody could say later who had processed a bill or what they changed.

Key Challenges

The friction showed up at every stage, from reading the document to proving later what had happened to it.

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Our Solution

We built a deterministic, AI-assisted workflow that automates the reading and classification of invoices while keeping a person in control of what gets posted. AI handles extraction and classification; reviewers verify and correct. Every invoice moves through the same fixed pipeline, lands in Zoho Books as a draft bill, and leaves a complete audit record behind it.

Our <span class="primary-color">Solution</span>

The Results

The tool changed how the finance team spends its time on accounts payable.

Reduced Manual Effort

Reduced Manual Effort

Invoice entry became a review task. Staff check and correct what the model extracted, which takes a fraction of the time.

Improved Accuracy

Improved Accuracy

Automated GST handling and AI extraction cut the human errors that came with manual calculation and typing.

Faster Processing

Faster Processing

Turnaround dropped significantly once reviewers stopped entering data from scratch.

Consistent Vendor Matching

Consistent Vendor Matching

The matching cascade reduced duplicate vendor records and improved data consistency across the ledger.

Full Auditability

Full Auditability

Every processed invoice is logged in Google Sheets and in the system itself, so each bill can be traced back to the person who approved it.

Production-Ready Scalability

Production-Ready Scalability

The system runs across environments and handles real invoice processing workloads reliably.

Tech Stack

Language: Python 3.12 Framework: FastAPI (0.136.0) with Starlette Server: Uvicorn Validation & Configuration: Pydantic (v2.x), pydantic-settings, python-dotenv Authentication & Security: python-jose (JWT with HS256), Google ID-token verification, middleware for request tracking, audit logging, and error handling File Upload Handling: python-multipart

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