The JoltMile Knowledge Centre is here

The Knowledge Centre replaces the old Guides placeholder with a proper structure: long-form guides, focused articles, short FAQs, news, and JoltMile Help pages explaining how each figure in the app is worked out.

Everything in it is free and does not need an account. Two things it is built around:

• Every factual claim cites gov.uk. Tax content that is vague or wrong is worse than none, so each page links to the official source and carries the date it was last checked.
• The numbers come from the app. Rates and thresholds quoted in the content are read from the same constants the calculation engine uses, so a guide cannot quietly contradict the arithmetic.

It is a starting corpus rather than a finished library. Guides on tax, mileage, insurance, getting started and multi-apping are live, along with platform and topic hubs and search across the lot. More is being written.