Fiscal tax year calculator, retrieve the tax-year, month and week for a given date. Start date of the financial year is editable.

`irs-form-filler` is a tool for filling out Internal Revenue Service (IRS) income tax forms for the 2021 tax year. Given a simple input file, this tool will generate a series of documents for filing with the IRS.

Embed the UK Take-Home Pay Calculator (2026/27 tax year) into any website. Income tax + NI + pension + student loan, by JobLabs.ai.

Medusa Tax module

TaxMaxi CLI - Crypto tax infrastructure for fintechs, degens, and AI agents.

Standard Number Validation

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

JavaScript date/time utilities for Vega.

TaxJar Sales Tax API for Node

A library for obtaining browser versions with their maximum supported Baseline feature set and Widely Available status.

Calculates Easter for a given year

Chinese Calendar

A natural language date parser in Javascript

Your AI agent, fluent in Australian tax. MCP server with cited answers from 34,500+ ATO documents, the income tax and GST Acts and 4,900+ rulings, plus deduction, depreciation, BAS and audit-risk tools that know your tax profile.

NPM package with functionality to calculate Dutch Tax Income

Canadian tax data and calculation functions.

Simple package to validate a german tax ID (Steuerindentifikationsnummer)

Simple utility to get the current year with 2 or 4 digits.

Tax SDK for Awaken

Revised Bengali Calendar