To view your billing history, from your Celtx studio choose "Management", then choose "Plan".
Scroll until you see the "Review Your Billing" section, and then click on "You can review your billing history here". 
Also in the "Review Your Billing" section you can customize your invoices by adding VAT, studio name, address, and phone number. To customize, do the following:
1. Select "Receipt Information":
2. This screen shows the information currently on your receipt. Select "Update" to add or change:
3. Fill in your preferred details and select "Update". Your receipts will now be updated with this information.
