Wordpress PHP - How to show a div only if it is in a specific category within a custom Taxonomy

this is a custom post type with slug "project" that has a custom taxonomy with slug "project-category" on my singles page within my custom taxonomy "retail" has a category id of 5 and "education" has a category id of 20.I want to only display the div and its contents only if the specific category id is associated with the post on the singles page... 

<? if ( is_tax('project-category', '5' ) ) { ?>
change to
<? if ( is_tax('project-category', 'retail' ) ) { ?>

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<? if ( is_tax ( 'project-category', '20' ) ) { ?> 
change to
<? if ( is_tax ( 'project-category', 'education' ) ) { ?>

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         <!-- Category back buttons -->
         
               
          <?php if ( is_tax( 'project-category', 'retail' ) ) { ?>
            <!-- Retail -->
            <div>
               <a href="/category-retail/" title="view more retail projects">View More Retail Projects</a>
            </div>   
         <?php } ?>
            
            
          <?php if ( is_tax ( 'project-category', 'education' ) ) { ?>
            <!-- Education -->
            <div>
               <a href="/category-education/" title="view more retail projects">View More Education Projects</a>
            </div>   
         <?php } ?>            
            
         <!-- End Category back buttons -->

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         <? $image_gallery = get_post_meta($post->ID, "wpcf-additional-images");array_push($image_gallery, get_post_meta($post->ID, "wpcf-primary-image", true));
         
         foreach ($image_gallery as $image) {
         
            if ( count($image_gallery) == 2 ) { $layout = "layout2"; }
            if ( count($image_gallery) == 3 ) { $layout = "layout3"; }
            if ( count($image_gallery) == 4 ) { $layout = "layout3"; }
            if ( count($image_gallery) > 4 ) { $layout = "layout3"; }
            
            ?>
            <div class="portfolio-box <?=$layout;?>">
               <a href="<?=$image;?>"><div class="bck-holder" style="background-image:url(<?=$image;?>)"></div></a>
            </div>
            <?
         
         }
         
         ?>

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yeah I tried it that way as well but still nothing outputs and I would rather use the tax id incase the category name ever changes 

$taxonomy = get_query_var('taxonomy');
$queried_object = get_queried_object();
$term_id = (int)$queried_object->term_id;

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here is an example of a loop that does work ... I'm thinking I may need to include $post->ID  someplace perhaps? 

global $wp_query;    
$page_id = $wp_query->post->ID;

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get_queried_object_id() 

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         <!-- Category back buttons -->
         
               
          <?php
            $taxonomy = get_query_var('taxonomy');
            $queried_object = get_queried_object();
            $term_id = (int)$queried_object->term_id;            
            
            if ( is_tax( 'project-category', 'retail' ) ) { ?>
            <!-- Retail -->
            
            <div>
               <a href="/category-retail/" title="view more retail projects">View More Retail Projects</a>
            </div>
               
         <?php } ?>
            
            
          <?php
            $taxonomy = get_query_var('taxonomy');
            $queried_object = get_queried_object();
            $term_id = (int)$queried_object->term_id;   
            
            if ( is_tax ( 'project-category', 'education' ) ) { ?>
            <!-- Education -->
            <div>
               <a href="/category-education/" title="view more retail projects">View More Education Projects</a>
            </div>   
         <?php } ?>            
            
         <!-- End Category back buttons -->

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Could you please provide an example of how to implement the echo suggestion you gave? 

if ( is_tax( 'project-category', 'retail' ) ) { 
  echo "TESTING";
}

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<?php
/**
 * Template used for single posts and other post-types
 * that don't have a specific template.
 *
 * @package Avada
 * @subpackage Templates
 */


// Do not allow directly accessing this file.
if ( ! defined( 'ABSPATH' ) ) {
   exit( 'Direct script access denied.' );
}
?>
<?php get_header(); ?>


<section id="content" <?php Avada()->layout->add_style( 'content_style' ); ?>>
   
   
      
   
   
   <?php if ( fusion_get_option( 'blog_pn_nav' ) ) : ?>
      <div class="single-navigation clearfix">
         <?php previous_post_link( '%link', esc_attr__( 'Previous', 'Avada' ) ); ?>
         <?php next_post_link( '%link', esc_attr__( 'Next', 'Avada' ) ); ?>
      </div>
   <?php endif; ?>


   <?php while ( have_posts() ) : ?>
      <?php the_post(); ?>
      <article id="post-<?php the_ID(); ?>" <?php post_class( 'post' ); ?>>
         <?php $full_image = ''; ?>
         <?php if ( 'above' === Avada()->settings->get( 'blog_post_title' ) ) : ?>
            <?php if ( 'below_title' === Avada()->settings->get( 'blog_post_meta_position' ) ) : ?>
               <div class="fusion-post-title-meta-wrap">
            <?php endif; ?>
            <?php $title_size = ( false === avada_is_page_title_bar_enabled( $post->ID ) ? '1' : '2' ); ?>
            <?php echo avada_render_post_title( $post->ID, false, '', $title_size ); // phpcs:ignore WordPress.Security.EscapeOutput ?>
            <?php if ( 'below_title' === Avada()->settings->get( 'blog_post_meta_position' ) ) : ?>
               <?php echo avada_render_post_metadata( 'single' ); // phpcs:ignore WordPress.Security.EscapeOutput ?>
               </div>
            <?php endif; ?>
         <?php elseif ( 'disabled' === Avada()->settings->get( 'blog_post_title' ) && Avada()->settings->get( 'disable_date_rich_snippet_pages' ) && Avada()->settings->get( 'disable_rich_snippet_title' ) ) : ?>
            <span class="entry-title" style="display: none;"><?php the_title(); ?></span>
         <?php endif; ?>


         <?php avada_singular_featured_image(); ?>


         <?php if ( 'below' === Avada()->settings->get( 'blog_post_title' ) ) : ?>
            <?php if ( 'below_title' === Avada()->settings->get( 'blog_post_meta_position' ) ) : ?>
               <div class="fusion-post-title-meta-wrap">
            <?php endif; ?>
            <?php $title_size = ( false === avada_is_page_title_bar_enabled( $post->ID ) ? '1' : '2' ); ?>
            <?php echo avada_render_post_title( $post->ID, false, '', $title_size ); // phpcs:ignore WordPress.Security.EscapeOutput ?>
            <?php if ( 'below_title' === Avada()->settings->get( 'blog_post_meta_position' ) ) : ?>
               <?php echo avada_render_post_metadata( 'single' ); // phpcs:ignore WordPress.Security.EscapeOutput ?>
               </div>
            <?php endif; ?>
         <?php endif; ?>
         <div class="post-content">
            <?php the_content(); ?>
            <h4>Testing normal content</h4>
         <!-- Category back buttons -->
               
          <?php
            $taxonomy = get_query_var('taxonomy');
            $queried_object = get_queried_object();
            $term_id = (int)$queried_object->term_id;            
            
            if ( is_tax( 'project-category', 'retail' ) ) {
            echo "TESTING";
            }
               
          ?>
            
            
          <?php
            $taxonomy = get_query_var('taxonomy');
            $queried_object = get_queried_object();
            $term_id = (int)$queried_object->term_id;   
            
            if ( is_tax ( 'project-category', 'education' ) ) { ?>
            <!-- Education -->
            <div>
               <a href="/category-education/" title="view more retail projects">View More Education Projects</a>
            </div>   
         <?php } ?>            
            
         <!-- End Category back buttons -->            
            
            
            
            
                  <?php
         $theTerms = wp_get_post_terms( $post->ID, 'project-category', array("fields" => "all"));
         $termLink = get_term_link($theTerms[0]->term_id, 'project-category');
         ?>
         
         
         <? $image_gallery = get_post_meta($post->ID, "wpcf-additional-images");array_push($image_gallery, get_post_meta($post->ID, "wpcf-primary-image", true));
         
         foreach ($image_gallery as $image) {
         
            if ( count($image_gallery) == 2 ) { $layout = "layout2"; }
            if ( count($image_gallery) == 3 ) { $layout = "layout3"; }
            if ( count($image_gallery) == 4 ) { $layout = "layout3"; }
            if ( count($image_gallery) > 4 ) { $layout = "layout3"; }
            
            ?>
            <div class="portfolio-box <?=$layout;?>">
               <a href="<?=$image;?>"><div class="bck-holder" style="background-image:url(<?=$image;?>)"></div></a>
            </div>
            <?
         
         }
         
         ?>          
         
         
         


         <?php if ( ! post_password_required( $post->ID ) ) : ?>
            <?php if ( '' === Avada()->settings->get( 'blog_post_meta_position' ) || 'below_article' === Avada()->settings->get( 'blog_post_meta_position' ) || 'disabled' === Avada()->settings->get( 'blog_post_title' ) ) : ?>
               <?php echo avada_render_post_metadata( 'single' ); // phpcs:ignore WordPress.Security.EscapeOutput ?>
            <?php endif; ?>
            <?php do_action( 'avada_before_additional_post_content' ); ?>
            <?php avada_render_social_sharing(); ?>
            <?php $author_info = fusion_get_page_option( 'author_info', $post->ID ); ?>
            <?php if ( ( Avada()->settings->get( 'author_info' ) && 'no' !== $author_info ) || ( ! Avada()->settings->get( 'author_info' ) && 'yes' === $author_info ) ) : ?>
               <section class="about-author">
                  <?php ob_start(); ?>
                  <?php the_author_posts_link(); ?>
                  <?php /* translators: The link. */ ?>
                  <?php $title = sprintf( __( 'About the Author: %s', 'Avada' ), ob_get_clean() ); // phpcs:ignore WordPress.WP.GlobalVariablesOverride ?>
                  <?php $title_size = ( false === avada_is_page_title_bar_enabled( $post->ID ) ? '2' : '3' ); ?>
                  <?php Avada()->template->title_template( $title, $title_size ); ?>
                  <div class="about-author-container">
                     <div class="avatar">
                        <?php echo get_avatar( get_the_author_meta( 'email' ), '72' ); ?>
                     </div>
                     <div class="description">
                        <?php the_author_meta( 'description' ); ?>
                     </div>
                  </div>
               </section>
            <?php endif; ?>
            <?php avada_render_related_posts( get_post_type() ); // Render Related Posts. ?>


            <?php $post_comments = fusion_get_page_option( 'blog_comments', $post->ID ); ?>
            <?php if ( ( Avada()->settings->get( 'blog_comments' ) && 'no' !== $post_comments ) || ( ! Avada()->settings->get( 'blog_comments' ) && 'yes' === $post_comments ) ) : ?>
               <?php comments_template(); ?>
            <?php endif; ?>
            <?php do_action( 'avada_after_additional_post_content' ); ?>
         <?php endif; ?>
      </article>
   <?php endwhile; ?>
</section>
<?php do_action( 'avada_after_content' ); ?>
<?php get_footer(); ?>

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$taxonomy = get_query_var('taxonomy');
echo "taxonomy :".$taxonomy

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$queried_object = get_queried_object();
var_dump( get_queried_object() );

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$term_id = (int)$queried_object->term_id;   
echo "term_id :".$term_id

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          <?php
            $taxonomy = get_query_var('taxonomy');
            echo "taxonomy :".$taxonomy   ?>

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          <?php
   $queried_object = get_queried_object();
var_dump( get_queried_object() );
            ?>

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          <?php
$term_id = (int)$queried_object->term_id;  
echo "term_id :".$term_id
            ?>

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this is a custom post type with slug "project" that has a custom taxonomy with slug "project-category" on my singles page within my custom taxonomy "retail" has a category id of 5 and "education" has a category id of 20. 

<?php
$term_id = get_queried_object_id(); 
echo "term_id :".$term_id
?>

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<?php
$tax = $wp_query->get_queried_object();   
echo ''. $tax->name . '';   
echo "<br>";   
echo ''. $tax->description .''; 
?>

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<?php
$terms = wp_get_object_terms( get_queried_object_id(), 'project-category');
$term_id = $terms[0]->term_id;
echo "term_id :".$term_id;
?>

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<?php
$terms = get_the_terms( $post->ID, 'project-category');
foreach ( $terms as $term ) 
{    
  $termID[] = $term->term_id; 
}
echo "term_id :".$termID[0];
?>

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<?php
global $post;
$terms = wp_get_post_terms( $post->ID, 'project-category',array('fields' => 'ids') ); 
print_r($terms);
?>

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<?php $term_id = get_queried_object_id(); echo "term_id :".$term_id ?>

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<?php $tax = $wp_query->get_queried_object();   echo ''. $tax->name . '';   echo "<br>";   echo ''. $tax->description .''; ?>

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<?php
$terms = wp_get_object_terms( get_queried_object_id(), 'project-category');
$term_id = $terms[0]->term_id;
echo "term_id :".$term_id;
?>

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<?php $terms = get_the_terms( $post->ID, 'project-category'); foreach ( $terms as $term ) {      $termID[] = $term->term_id; } echo "term_id :".$termID[0]; ?>

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<?php global $post; $terms = wp_get_post_terms( $post->ID, 'project-category',array('fields' => 'ids') ); print_r($terms); ?>

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         <!-- Hospitality -->
         <?php wp_reset_query(); ?>   
         <?php
         $terms = get_the_terms( $post->ID, 'project-category');


         foreach ( $terms as $term )
         {
           $term_id = (int)$term->term_id;


           if($term_id==29){
            echo " <div class='back-button-wrap'>
                     <a href='/category-hospitality/' title='view more hospitality projects'><button class='fusion-button button-flat fusion-button-default-size button-default button-1 fusion-button-default-span fusion-button-default-type'>View More Hospitality Projects</button></a>
                  </div>";
           }
         }
         ?>    

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