Our Methodology
How we research jurisdiction rules
Every jurisdiction rule on Astrilio is sourced directly from the authoritative statute, regulation, or government page — not from third-party summaries. Each rule links to its primary source so you can verify it yourself.
We record a Last Verified date for each pack. This is a factual claim: a member of the Astrilio team personally reviewed the source on that date. We do not claim rules are "reviewed by a professional" unless we publish the professional's name and credentials.
What we are not
Astrilio is an information aggregator and calculator tool, not a law firm or accounting firm. Nothing on this site constitutes legal, tax, or financial advice. Our calculators are for informational and planning purposes only. Always verify results with a qualified professional before making decisions.
How to report an error
Laws change. If you spot an outdated or incorrect rule, please email us at support.cosyslabs@gmail.com with a link to the official source. We will investigate and update the affected pack.
Data Sources & Trust
- ✓Open formulas. Every calculator formula is documented and linked from the calculator page itself — no black boxes.
- ✓Official government sources. Jurisdiction rules cite official statutes, regulations, or government web pages — not third-party summaries.
- ✓Last Verified dates. Every jurisdiction rule pack displays the date a team member last personally reviewed the source. Stale data is flagged.
- ✓No AI-generated legal content. All jurisdiction rule data is researched and verified by humans against official sources before publication. We do not use AI to generate or fill in rule values.