When you use the WooCommerce Variation Prices plugin, there are two ways to indicate whether you are showing the prices with or without tax/VAT.

Use a custom variation price format

WooCommerce Variation Prices lets you set a custom format for your variable product prices. You can use this to manually add a note about tax to the product price display.

To do this, select the 'Custom' price range format and enter the text in the box that appears below.

This will only be used for variable products where the variations have different prices.

Use a price display suffix

WooCommerce itself lets you add a 'Price display suffix' which is automatically added after all your product prices. The WooCommerce Variation Prices plugin works with this, so you can use our plugin to customize the format of your variation prices, while appending a price display suffix to the end.

This will be used for all products throughout your store.

To add a price display suffix, go to WooCommerce → Settings → Tax.