<?php
function custom_cart_totals_order_total_html( $value ){
    $value = '<strong>' . WC()->cart->get_total() . '</strong> ';

// If prices are tax inclusive, show taxes here.
	if ( wc_tax_enabled() && WC()->cart->display_prices_including_tax() ) {
		$tax_string_array = array();
		$cart_tax_totals  = WC()->cart->get_tax_totals();
		if ( get_option( 'woocommerce_tax_total_display' ) === 'itemized' ) {
			foreach ( $cart_tax_totals as $code => $tax ) {
				$tax_string_array[] = sprintf( '%s %s', $tax->formatted_amount, $tax->label );
			}
		} elseif ( ! empty( $cart_tax_totals ) ) {
			$tax_string_array[] = sprintf( '%s %s', wc_price( WC()->cart->get_taxes_total( true, true ) ), WC()->countries->tax_or_vat() );
		}

        if ( ! empty( $tax_string_array ) ) {
            $taxable_address = WC()->customer->get_taxable_address();
            $estimated_text  = '';
            $value .= '<small class="includes_tax">' . sprintf( __( 'Price with VAT', 'woocommerce' ), implode( ', ', $tax_string_array ) . $estimated_text ) . '</small>';
        }
    }
    return $value;
}

add_filter( 'woocommerce_cart_totals_order_total_html', 'custom_cart_totals_order_total_html', 20, 1 );