- Hungary’s NAV is updating its Online Invoice system for better data accuracy from 15 September 2025
- 3 new WARN messages added for potential content inaccuracies
- 3 existing WARN messages will be deactivated
- 1 INFO message upgraded to WARN
- 15 WARN messages will become ERROR messages blocking data submission due to issues
Source: vatcalc.com
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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