API and Application Updates for National e-Invoice System and KSeF Taxpayer App (Demo)

• API update of the National e-Invoice System and KSeF Taxpayer Application in the pre-production environment (Demo) is scheduled for September 28, 2023, from 2:00 p.m. to 4:00 p.m.
• Changes in the API include altering the structure of the document with a history of changes, modifying the type in Query Invoice Detail for amountType, improving authorization error handling, changing the Interface Specification, restoring the final status of 200 for the session process, and improving coding for the telephone field in the invoice archiving step.
• The update of the KSeF Taxpayer Application involves changes in the PDF visualization of e-Invoices.
• The pre-production (Demo) environment will be unavailable during the update.

Source: podatki.gov.pl

Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.

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