Hi jaydee,
The second example with the "this order is tax exempt" is already working just fine but the problem is with the VAT invoice. I want to display product prices without the VAT, regarless if the customer has to pay it or not, and only show the VAT amount added to the subtotal area of the invoice... If I play with the settings in the backend it also has its affect on the website, this is unwanted because that works ok.
I'll play around with it some more to fix it myself. If anyone has any info or has already done it, please let me know

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www.qualitylamps.eu
X-Cart Gold 4.1.8, PHP 5.2.6, MySQL 5.0.51a, Apache 2.2.9
www.vervangjelamp.nl
X-Cart Gold 4.2.0, PHP 5.2.6, MySQL 5.0.37-standard, Apache/2
Sorry for the weird user name, I registered it by mistake