How Fiscari finds and cites its sources
Last updated: November 3, 2026
In short: Fiscari answers UK tax questions only from UK government sources, cites the source for every claim, and declines to answer when it can’t find one, without charging for the refusal.
What Fiscari searches
Over 100,000 sections of UK primary legislation, HMRC manuals, VAT notices, Revenue & Customs Briefs, tribunal decisions and official GOV.UK guidance. Nothing else: no forums, blogs or general web pages.
How each answer is cited
Every answer comes with full references: the source, the section number and a link, shown inline next to the claim it supports, so you can check each point before relying on it.
When Fiscari declines to answer
If Fiscari can’t locate and cite an authoritative UK government source for a question, it says so rather than guess, and doesn’t charge for the refusal. Every answer it does give is traceable to its source.
How it differs from general AI tools
General AI chat tools answer from training data that is often one to two years old, with no connection to authoritative sources, so their citations can be vague or made up. See Fiscari vs ChatGPT and how Fiscari compares with Tolley, Croner-i, Blue J and Checkpoint.
For developers: the Fiscari API
Software teams can add the same cited answers to their own products through a RESTful API with JSON responses and structured citations in every response, with rate limiting and usage analytics. See the Fiscari API page or read the API documentation.