There is nothing hard as long as you follow our documentation on taxes.
First there is no need to modify any zone in HikaShop.
Here is an example of the tax rules that we have on our website:
Simply remove the Guadeloupe tax rule and change the France zone to Netherlands and that will be all you need to configure for your tax rules.
You can use the default tax category as it is already selected by default in your products. There is no need to create a "software" tax category on your end.
And finally, in the "main tax zone" of your configuration, you can select the Netherlands instead of the default one.