How to issue an e-invoice?

• E-invoice is a structured invoice in XML format
• It can be generated and sent to KSeF using a free MF web application or a commercial invoice issuing program
• The MF web application is not efficient for handling multiple purchase and sales invoices
• Commercial programs allow for preparing invoices in XML format, sending sales invoices to KSeF, and downloading purchase invoices from KSeF
• Access to the MF web application can be for production, demo, or testing purposes
• Authentication is required to access the MF web application, either using trusted profiles, qualified electronic signatures, or qualified electronic seals
• Companies other than individuals do not necessarily need a qualified electronic seal to use KSeF, but they must designate an authorized person to use KSeF
• Commercial programs also require authentication, which can be done using electronic signatures/seals, trusted profiles, or generated tokens
• Buyers can access e-invoices through the MF web application or their own financial and accounting program, after authentication
• If the buyer is not a VAT active entity, the seller must provide a visual representation of the e-invoice outside of KSeF, such as in paper or PDF format.

Source: zrozumvat.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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