It is important to understand Unicontas posting hierarchy when setting up automatic posting. If automatic posting is not set up correctly, then posts will be made to other accounts/VAT codes than expected.
The hierarchy for which accounts/codes Uniconta uses, for example, for customer postings is: Order lines, Order head, Customer card, Item posting, Customer or Item group.
Read more about posting hierarchy at the bottom of the following articles: (articles are currently in Danish, please use chrome translator): Customer postings, Vendor postings, Item group postings.