- The KSeF invoice number is assigned after sending the invoice to the National e-Invoice System and is not included in the XML file itself.
- Software providers must link the KSeF number with the sent XML file, as the system does not modify the XML content.
- The visibility of the KSeF number in accounting tools depends on the solutions implemented by software developers.
- The KSeF number is available in the Taxpayer Application in several places, including invoice visualization, invoice list, and file name (XML and PDF).
- Accounting offices may need to scan QR codes on invoices or rely on additional tools to access all necessary data for posting invoices, especially if clients send invoices via email.
Source: prawo.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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