Follow these steps to setup taxes throughout the website and backend:
Login to the Peoplevine Control Panel
Click on the Company Menu and go to Platform Settings under Settings & Tools
Enter the tax amounts under Transaction Options
You can edit eCommerce Taxes under Sell > Commerce > Commerce Settings
Please note that the Default Tax Amount will be applied to all transactions except if you specify a specific tax for subscriptions, events or schedulers. With the exception we do not charge taxes for gift cards, donations, one-time payments and different rules are applied in eCommerce.