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31 published tools · 8 live countries

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Search a tax problem, run the numbers, and see the rule behind the result — with tax year, authority, law and verification date.

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8 countries with source-backed published tools
  • Official sources73 published sources registered
  • Tax period shownRules are tax-year / fiscal-year aware
  • Last-reviewed date04 Oct 2026
  • Legal referencesPublished rules retain source links
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Page updated . This is a page update, not a new tax-rule review.