An open-source, rules-based engine for accurate and consistent Philippine tax calculations. Work in progress.

MCP server for French tax calculations and information - enables AI assistants to provide accurate French tax guidance

Free WordPress Plugin: Instantly calculate total product costs with our free Sales Tax Calculator. Compute combined U.S. state and local tax rates to know exactly what you'll pay. www.calculator.io/sales-tax-calculator/

Motor de cálculo tributário brasileiro com precisão decimal arbitrária. ICMS, IPI, DIFAL, ST (5 cenários), CBS/IBS.

A python program to automate the tax calculation by reading the XLS file for initial income and adding the coloum of "Tax Payable" in the same XLS file

TaxTracker: Characterize capital gains and qualify dividends based on trading activity.

🎫 An web application that calculates net earnings from various forms of taxation in Poland 〽️

A Ruby gem for calculating product taxes using the Washington DOR API, supporting manual tax rates and cart-based calculations.

A suite of web-based GST compliance engines for India: Time of Supply (TOS), Value of Supply (VOS), and Place of Supply (POS) logic tools for audit workflows.

A comprehensive web application designed to facilitate accurate and efficient VAT calculations. Built on the Laravel 11 framework, this project leverages modern web development practices to deliver a robust and user-friendly platform.

Professional Open Source E-Invoicing System for PHP (Yii3) with UBL 2.1 and Peppol support

Multi-company water consumption tracking with vendor management, attendance-based billing, and invoice generation

🏢 Enterprise-grade Java cost calculation system with advanced tax processing, discount management, and professional financial reporting. Features multi-mode calculations, currency formatting, input validation, and comprehensive business analytics. Perfect for e-commerce, retail, and educational applications.

Scheduled equity purchase platform built with .NET 10, MySQL, and Kafka: client onboarding, Top Five portfolio management, purchase engine, proportional distribution, rebalancing, COTAHIST import, and tax event publishing.

SmartTax Pro is an advanced Java program for accurately computing income tax based on user input for filing status and taxable income. Features dynamic user input handling, sophisticated tax calculation according to U.S. federal tax brackets, and robust error handling.

Check - Stripe-incubated embedded payroll API

Lightweight Laravel shopping cart library supporting custom Eloquent models, events & tax calculation.

Sidecar webhook listener that adds destination-based US sales tax to Invoice Ninja v5 invoices via the self-hosted OpenSalesTax engine

Software Construction and Development Semester Project in JAVA : Authentic Based Tax Calculator; Complete Report and screen shots of the project has been attached.