Legal information, not legal advice
The lessons collect legal and tax information from government pages and official documentation. They are not legal, tax or financial advice, and no lesson creates a professional relationship. Fees, deadlines and rules change: re-read each one on its linked page before you act. A licensed attorney or a certified public accountant decides anything that depends on your own facts.
Original site material
Justin Calderon creates the lesson explanations, drawings and interactive figures for this site. The original site text, drawings, code and design are reserved to their rightsholder. Unless permission or a separate licence says otherwise, please ask before copying, redistributing or adapting that material. This does not limit uses permitted by law, including applicable quotation and fair-use exceptions.
The sources: government pages and official documentation
Each lesson links every page it draws on. Rights in third-party material remain with the respective rightsholders, and this site's rights notice grants no permission to reuse those works. The lessons explain the sources in their own words and do not host copies of them. A tool's name is used only to identify the tool; no lesson is endorsed by a government agency, a tool maker or any other referenced organization unless expressly stated.
Corrections and removal requests
A contact address for corrections and removal requests will be listed here when the site has its own domain.
Privacy and no tracking
The site has no analytics, tracking scripts, advertising, sign-up forms or contact forms, and its code sets no cookies. It does not track readers. A figure where you enter your own numbers keeps them in your browser; they are not sent to us. Your browser may also store local preferences for the contents panel and figure visibility. You can clear them in your browser's site-data settings.
The site's host receives ordinary connection information, such as your IP address, to deliver it. Fonts load from Google Fonts, so your browser also contacts Google and sends connection information. These providers may process request data under their own policies, for example the Google Fonts privacy information.