No tax calculation despite error-free check

[Nigan]

Hello everyone,,
Despite error-free testing, the tax calculation - which was otherwise very uncomfortable to produce - was not carried out. The missing information, in this case on Annex KAP should have already noticed during the formal check.
Or does the exam have a different meaning?

[Charlie24]

AW: No tax calculation despite error-free check

There are tax cases where the calculation is not possible. Please specify the exact wording of the message.