This tax can be exempted if a customer is EU-registered company with a valid VAT ID.
To set your company's details:
1. Go to your control panel at yourserver.se
2. Click on Hello, {YourName} at the right side of the menu
3. Select Edit Account Details
4. You will find VAT field at the bottom of the form:

If you wish to recreate existing invoices with correct VAT, please, post a support ticket to our Billing department. You will get your new invoices within 1 business day.