Hello,
Unfortunately the upgrade tool does not handle differences between different localizations. On the good news, I think that Danish localization is not major, so there should not be major structural differences - the main one would be OIOUBL xml-tax reporting that would need to be set up. In Object Designer, filtering on version list @*DK* will show any localized objects, which in relations to tables is just one - table 13600 "OIOUBL Profile". For fields, you can add some columns to page 6218 "Field List", or make a new page based on the "Field" table, and filter on "No." = 13600..13699, and that will show you fields added in DK localization, so that's where the table structure differs DK vs W1. There are no tools that I am aware of to automate setting up the Danish parts of localization or upgrading them from W1. I hope this helps a little bit, and if others have actually tried this, that they can also advice,
