I need a TAX invoice
When you make a purchase on the Flothemes website you will need to create a user account with your email. Here, besides your downloads, you will also find order details.
For each order, you can download an invoice, as per the screenshot attached:
If you need to edit your details for a specific order, click on the order nr. This will open a detailed page of your order with options to edit your Billing details, add a TAX id, etc. :