Where do I add this pieces of code

where are these hooks suposed to be put on? https://rankmath.com/kb/filters-hooks-api-developer/

/**
 * Filter: 'rank_math_remove_reply_to_com' - Allow or disable the Rank Math feature that removes <code>?replytocom</code> 
 * query parameters from URLs.
 * @param bool $return True to remove, false not to remove.
 */
add_filter( 'rank_math/frontend/remove_reply_to_com', '__return_false');