# $productPage->taxRule()

> Content field: Key of the tax rule that applies to this product, `default` when empty

- Source: `src/ProductPage.php#L14` <https://github.com/wagnerwagner/merx/blob/2.0.0-alpha.11/src/ProductPage.php#L14>

```php
$productPage->taxRule(): \Kirby\Content\Field
```

## Return type

`\Kirby\Content\Field`

## Parent class

`Wagnerwagner\Merx\ProductPage`