# National Tax Tools > Educational U.S. tax calculators and reference guides for taxpayers, freelancers, and small business owners. Content is reviewed by a tax professional and cites primary IRS and state .gov sources. For educational purposes only; not tax, legal, or financial advice. ## Core Pages - [Calculators Hub](https://nationaltaxtools.com/calculators/): free federal and state tax calculators - [Guides Hub](https://nationaltaxtools.com/guides/): tax explainers with IRS citations - [Refund Tracker Hub](https://nationaltaxtools.com/refund-tracker/): federal and per-state refund status - [Tax Deadlines](https://nationaltaxtools.com/tax-deadlines/): federal filing and payment deadlines ## Authorship and Trust - [Munib Ur Rehman (Founder and Author)](https://nationaltaxtools.com/about/munib-ur-rehman/) - [Nausheen Shahid (Tax Reviewer, LMN Tax Inc.)](https://nationaltaxtools.com/about/nausheen-shahid/) - [Editorial Policy](https://nationaltaxtools.com/editorial-policy/): sourcing and review standards ## Optional - [Sitemap](https://nationaltaxtools.com/sitemap.xml) - [Contact](https://nationaltaxtools.com/contact/) - [Privacy Policy](https://nationaltaxtools.com/privacy-policy/) ## Usage You may reference and summarize content from this site for informational purposes. Please attribute to "National Tax Tools (nationaltaxtools.com)".