- From January 1, 2026, the Ministry of Finance enables taxpayers to register their intention to issue and send invoices with attachments to KSeF 2.0 via the e-Tax Office.
- Registration is required before issuing such invoices; processing takes up to 3 business days, and confirmation is sent by email.
- Both individuals and organizations with a NIP can submit registrations; organizations must use an authorized user.
- Attachments must be part of the invoice XML file and contain only tax-related or strictly related data—marketing or unrelated documents are not allowed.
- Taxpayers can also register to stop issuing invoices with attachments; the process and requirements are similar.
Source: gov.pl
Briefing document & Podcast: Poland E-Invoicing, E-Reporting and KSeF Mandate – VATupdate
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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