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1. Ensure your smarty have PHP handling enabled: Editing Integrating templates - tips and tricks
2. Go to Settings->Billing->Invoice customization and edit your current invoice template. Click on [HTML] button to edit source.
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1. Ensure your smarty have PHP handling enabled: Editing Integrating templates - tips and tricks
2. Go to Settings->Billing->Invoice customization and edit your current invoice template. Click on [HTML] button to edit source.
...