Thigs might be a bug and not a feature. But I could not find where to report the bug.

When importing account number (and some more fields) with REST API into the general journal VAT prod posting group is filled in. The information is taken from the account card and it is the only information that is collected. There is no reason for the VAT prod posting group to be filled in since it causes the line to be unpostable since it does not get any gen posting type. This stared happening with the 18.3 version.

Thanks for the help in advance.