Build software better, together

kdeldycke / awesome-billing

Sponsor

Star

💰 Billing & Payments knowledge for cloud platforms

Updated Oct 26, 2026

BittyTax / BittyTax

Sponsor

Star

Crypto-currency tax calculator with support for all popular wallets, exchanges, explorers and migration from other crypto tax platforms

crypto bitcoin tax cryptocurrency tax-calculator hmrc cryptoasset capital-gains tax-calculations cryptotax tax-reports

Updated Oct 5, 2026
Python

openaccountants / openaccountants

Star

Open tax skills for AI: 2,250 skills across 266 jurisdictions, every figure cited to the law. Works in ChatGPT, Claude, Cursor and any MCP client.

Updated Nov 8, 2026
HTML

DeHor-Labs / mcp-fiscal-brasil

Star

Servidor MCP fiscal brasileiro: CNPJ, NF-e, NFS-e, CT-e, SPED, eSocial, Simples Nacional, Reforma 2026. 44 tools, zero-cadastro, tabelas offline. Python.

python ai mcp brazil cnpj accounting tax nfe brasil sped fiscal claude esocial tax-automation llm mcp-server reforma-tributaria

Updated Nov 1, 2026
Python

Privacy-focused, free, open-source cryptocurrency tax calculator for multiple countries: it handles multiple coins/exchanges and computes long/short-term capital gains, cost bases, in/out lot relationships/fractioning, and account balances. It supports FIFO, LIFO, HIFO and it outputs in form 8949 format. It has a programmable plugin architecture

privacy crypto bitcoin coinbase ethereum accounting tax cryptocurrency btc taxes eth international altcoin nft cost-basis capital-gains tax-report nfts 8949

Updated Jul 27, 2026
Python

reingart / pyafipws

Star

Factura Electrónica AFIP y otros servicios web (proyecto software libre) — Interfases, tools and apps for Argentina's gov't. webservices (soap, com/dll simil-ocx, pdf, dbf, xml, json, etc.) #python

Updated Jul 20, 2025
Python

valeriansaliou / node-sales-tax

Sponsor

Star

💰 International sales tax calculator for Node (offline, but provides optional online VAT number fraud check). Tax rates are kept up-to-date.

sales tax vat invoice billing gst salestax vatmoss

Updated Nov 1, 2026
JavaScript

doino-gretchenliev / revolut-stocks

Star

A tax calculator for stocks and dividends activities.

irs tax bulgaria stocks bulgarian nap revolut bulgarian-national-revenue-agency

Updated Apr 9, 2022
Python

azu / github-sponsors-tax

Sponsor

Star

GitHub Sponsorsの確定申告手順

github sponsors tax japan

Updated Feb 11, 2026

PolicyEngine / policyengine-us

Sponsor

Star

The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.

python tax policy economics united-states public-policy inequality poverty economic-policy

Updated Nov 8, 2026
Python

provinzio / CoinTaxman

Star

Calculate your taxes from cryptocurrency gains

bitcoin coinbase german ethereum accounting tax germany cryptocurrency free taxation cryptocurrencies kraken binance tax-reporting bitpanda coinbase-pro steuererklaerung

Updated Sep 12, 2026
Python

filedcom / opentax

Star

Fully open-source US federal tax engine. Single binary cli. Runs on macOS, Linux, and Windows. Built for AI agents using AI agents.

cli ai irs tax usa agents federal 1040

Updated Oct 31, 2026
TypeScript

libracore / erpnextswiss

Star

ERPNext application for Switzerland-specific use cases

tax banking erpnext erpnext-application

Updated Nov 7, 2026
Python

kdeldycke / vat-rates

Sponsor

Star

💸 {Digital,Cloud,Electronic,Online} Services VAT Rate Database

csv tax vat-number tax-rate vat european-customers vat-rule vat-database territory european-businesses

Updated Sep 25, 2025

pH-7 / eu-vat-validator

Sponsor

Star

💰 A simple and clean PHP library that validates EU VAT registration numbers against the central ec.europa.eu database (using the official europa API) 🇪🇺

Updated Jun 25, 2024
PHP

UpstageAI / korean-tax-calc-mcp

Star

한국 세금 계산·세무조정 MCP — 원장 항목을 넣으면 항목 판단→세법상 조정→세무조정(소득처분)까지, 근거 조문·산식 포함 | Korean tax calculator MCP server: ledger-style facts in, item judgments, adjustments and VAT/income/corporate tax out, with statute citations