Professional Open Source E-Invoicing System for PHP (Yii3) with UBL 2.1 and Peppol support
php angular typescript orm peppol self-hosted billing hacktoberfest code-for-africa yii3 making-tax-digital e-invoicing tax-calculation window-cleaning node-js-22 invoice-automation ubl-2-1 cleaning-software 30-languages typescript-go-v7
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Updated
Jan 15, 2026 - PHP