Update of API for National e-Invoice System and Taxpayer Application on test environments

• API Krajowego Systemu e-Faktur and Aplikacji Podatnika KSeF will be updated on the test environment
• The update includes making the tradeName field in SubjectNameType optional and optimizing invoice queries
• The Aplikacji Podatnika KSeF will also be updated to version 1.4.3, adding an endpoint for returning the current version of the mobile application
• There may be temporary difficulties in accessing these environments during the update
• Apologies for any inconvenience caused.

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.