OpenTax

OpenTax — Open‑Source Framework for Indian Income Tax

OpenTax is a free, open‑source framework for Indian Income Tax.
It aims to democratise tax processing by making complex tax rules, calculations, and ITR generation accessible to everyone — individuals, developers, startups, and large-scale platforms.

Today, Indian tax logic is fragmented, opaque, and locked inside proprietary systems. There is no open, community‑maintained standard for tax computation. OpenTax changes that.

🚀 What OpenTax Provides

1. A Modern, Simple Web App for ITR Filing

A clean, intuitive interface for individuals to prepare and file Income Tax Returns without friction.

2. A Developer‑First Tax API

A fully open API that handles:

Tax calculations (old regime, new regime, special cases)
ITR construction (JSON schemas)
Validation and rule‑based checks
Edge cases and compliance logic

Developers can embed tax computation directly into their apps — payroll, fintech, accounting, wealth management, or compliance tools — without reinventing the wheel.

🧠 Why OpenTax Exists

Democratising Tax

Tax rules are public, but tax computation is not.
OpenTax makes tax logic transparent, inspectable, and verifiable.

Handling Complexity Together

Indian tax law evolves constantly — new sections, exemptions, limits, edge cases.
Instead of every company re‑implementing the same logic (and making the same mistakes), OpenTax builds a shared, community‑maintained knowledge base.

No Open‑Source Standard Exists

Despite millions of taxpayers and thousands of apps, there is no open-source reference implementation for Indian Income Tax.
OpenTax fills this gap with a public, auditable, extensible codebase.

🤝 Built With the Community

OpenTax thrives on collaboration:

Contributors help encode complex tax rules
Reviewers ensure correctness and compliance
Domain experts validate interpretations
Developers extend the API for new use cases

Together, we maintain a living, evolving standard for Indian tax computation.

🧩 Architecture at a Glance

Web App — A simple UI for individuals
Core Engine — Pure, deterministic tax computation logic
ITR Builder — Schema‑aware construction of ITR JSON
Validation Layer — Rule‑based checks for compliance
REST API — Plug‑and‑play for any external application

🌱 Our Vision

To build the Linux of Indian Tax —
a transparent, community‑driven, open standard that powers everything from personal tax apps to enterprise-scale compliance systems.

Target Users

A high‑level overview of who benefits from OpenTax — developers, CAs, fintechs, HRMS platforms, government, educators, and individual taxpayers.
See: TARGET USERS.md

Contribution Guidelines

Explains how developers and tax professionals contribute, their workflows, and how OpenTax maintains correctness through community collaboration.
See: CONTRIBUTING.md

Technical Documentation

Covers the full technical architecture — project structure, frontend, backend, environment setup, running services, testing, and deployment.
See: TECHNICAL.md

Getting Help

Channel	Link
Bug reports & feature requests	GitHub Issues
Browse the source	github.com/nootus/OpenTax
Email	connect@indiatax.ai
Powered by	IndiaTax.AI

If something is broken or unclear, opening a GitHub issue is the fastest way to get a response.

License

Apache License 2.0