Show VAT on event registration page
To enable Sales tax for an Event.


Enable Enable Tax and Invoicing setting in Administer >> CiviContribute >> CiviContribute Component Settings
Create a Financial Account of type Liability, Is Tax Enabled and Tax Rate > 0.
Link Financial Account with Financial Type using 'Sales tax Account is'.
Use financial type configured for tax at #3 for event, price set, and price fields.