current_user_can doesn’t work

i have this code for tax exempt capabilities

  if (is_user_logged_in() && !is_admin()) {
	add_filter( 'init', 'make_customer_tax_exempt' );
 }
 function make_customer_tax_exempt() {
	global $woocommerce;
	$tax_exempt = current_user_can( 'tax_exempt' );
	$woocommerce->customer->set_is_vat_exempt( $tax_exempt );
 }

with user role editor work, with aam doesn’t work… how can i fix that ?