- Attachments to e-invoices will be introduced in KSeF.
- Attachments will be an integral part of the invoice, not a separate file.
- Up to 1000 data blocks can be included in an attachment.
- Data blocks can be filled in three ways: dictionary, text, or tabular.
- Attachments are not mandatory.
- Attachments should not include commercial, marketing, or business information.
- PDF or JPG files cannot be attached.
- Any taxpayer can send an attachment.
- The functionality of sending attachments will be available after the submission of a notification.
Source: crido.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.
