Tax not included in Rankmath Product Schema

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.

Could you please try adding this filter to your site? This code will forcibly display prices in the schema with tax rates included.

add_filter( "rank_math/snippet/rich_snippet_product_entity", function( $entity ) {
	if(!is_product()){
		return;
	}
    global $product;
    $entity['offers']['price'] = wc_get_price_including_tax( $product );
    return $entity;
});

The filter should be added to your active theme’s functions.php file. Here’s another way to apply the filter using the rankmath.php file:
https://rankmath.com/kb/filters-hooks-api-developer/#adding-filters-and-hooks-in-rank-math-php

Once done, clear your website’s cache and check again.

I hope that helps.

Thank you.