Developer's Guide to Building e-Tax Invoice & e-Receipt in PDF/A-3 Using iText Library
As the Revenue Department and the Electronic Transactions Development Agency (ETDA) in Thailand accelerate the adoption of e-Tax Invoice & e-Receipt, compliance with the PDF/A-3 (ISO 19005-3) standard has become a paramount requirement for modern enterprises.
Why PDF/A-3 for e-Tax Invoices?
The PDF/A-3 standard introduces the concept of a Hybrid Document which bundles two essential representations into a single file:
- Visual Representation (PDF): A human-readable and printable document displaying the tax invoice details.
- Machine-Readable Data (XML): An embedded structured XML data file (
ETDA-invoice.xml) that allows automated processing by both your customers' systems and the Revenue Department.
Why Developers Choose iText Library?
For enterprise developers tasked with implementing this robust standard, iText Library offers the absolute highest class of document manipulation tools:
- High Performance & Accuracy: iText supports both Java and .NET environments, allowing developers to generate complex PDF/A-3 files, compile custom layouts, and embed XML payloads programmatically at enterprise scale.
- Cryptographic Digital Signature: Out-of-the-box support for secure digital signing compliant with ETDA guidelines and certificate validation.
- Commercial License Protection: Procuring an official iText Commercial License via AuthorWise ensures your proprietary enterprise code stays secure, bypassing the mandatory copyleft requirements of the AGPL open-source license.
Interested in iText Commercial Licensing or technical support for e-Tax Invoice integration? Contact the AuthorWise team today via iText Solutions or email us at contact@authorwise.co.th.