Billing Page link added to PMPro Account Page.

pmpro_billing_page_link.php

<?php

/**
 * This adds a custom link to the account page for Paid Memberships Pro.
 * Add the code below to your PMPro Customizations Plugin - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 * www.paidmembershipspro.com
 */

function pmpro_add_billing_page_link() {
	global $current_user;

	echo '<li><strong><a href="/link-to-billing-page">Billing Information</a></strong></li>'; //change href value.
}
add_action( 'pmpro_account_bullets_top', 'pmpro_add_billing_page_link' );