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EU-VAT Assistant

Developer reference for the EU-VAT Assistant add-on. These pages cover the WordPress actions and filters the plugin runs at checkout and in its settings screens.

Start here​

  • Getting started with EU-VAT Assistant hooks shows how to attach a callback and how dynamic hook names are written.
  • All hooks lists every action and filter. Each hook page includes the signature, parameters, the version that introduced it, and the source file.