How can we enable VAT for all users regardless of their location?
When enabling VAT, the organizer needs to add the Billing Company Country details and Billing Company VAT code. This applies VAT rules to users registered for the same country as the Billing Company Country details.
If the organizer wants the VAT details added to apply to all users regardless of the country they are registering from, they should enable the "Disable VAT rules" setting. This toggle allows the application of VAT to all users.
Steps to enable the settings
Navigate to Event Setup → Payments
Now go to the Taxes tab
Set Tax details like Tax Name, Billing Company Country, Default Tax % and Billing company VAT code
Now finally enable toggle Disable VAT rule, this will allow the application of the TAX on all users regardless of from which country they are registering

Enable Tax regardless of country