diff --git a/SITE_ID_AND_SYNC_SETTINGS_FIX.md b/SITE_ID_AND_SYNC_SETTINGS_FIX.md
new file mode 100644
index 00000000..e85980eb
--- /dev/null
+++ b/SITE_ID_AND_SYNC_SETTINGS_FIX.md
@@ -0,0 +1,318 @@
+# Site ID and Sync Settings Fix
+
+## Issues Addressed
+
+### 1. ❌ "Site ID not set" Error in WordPress Plugin
+**Problem:** Plugin showed "X Site ID not set" error preventing sync operations
+
+**Root Cause:** 
+- Plugin was taking the first site from `/system/sites/` API response
+- User has multiple sites (Home & Garden, Salman Sadiq, etc.)
+- Wrong site was being selected
+
+**Solution:**
+- Match site by domain name instead of taking first result
+- Added fallback to first site if no domain match
+- Added manual Site ID input field if auto-detection fails
+
+### 2. ✅ Taxonomy Selection Impact Verified
+**Question:** Does the "Taxonomies to Sync" checkbox selection have actual impact?
+
+**Answer:** **YES!** The taxonomy selection is fully functional:
+
+**Code Reference: `data/site-collection.php` (lines 318-325)**
+```php
+// Get enabled taxonomies from settings
+if (function_exists('igny8_get_enabled_taxonomies')) {
+    $enabled_taxonomies = igny8_get_enabled_taxonomies();
+    if (!empty($enabled_taxonomies)) {
+        $tracked_taxonomies = $enabled_taxonomies;
+    }
+}
+
+foreach ($tracked_taxonomies as $taxonomy) {
+    if (!taxonomy_exists($taxonomy)) {
+        continue;
+    }
+    // Only syncs enabled taxonomies
+}
+```
+
+✅ **Only checked taxonomies will be collected and synced**
+
+**When Selection Matters:**
+- ✅ "Collect & Send Site Data" button - respects selections
+- ✅ Cron jobs (automatic syncs) - respects selections  
+- ✅ Manual syncs from WP Admin - respects selections
+
+### 3. ✅ Post Type Selection Impact Verified
+**Question:** Does the "Post Types to Sync" checkbox selection have actual impact?
+
+**Answer:** **YES!** The post type selection is fully functional:
+
+**Code Reference: `data/site-collection.php` (lines 302-315)**
+```php
+foreach ((array) $settings['post_types'] as $post_type) {
+    if (!post_type_exists($post_type) || !igny8_is_post_type_enabled($post_type)) {
+        continue; // Skips disabled post types
+    }
+    
+    $posts = igny8_fetch_wordpress_posts($post_type, ...);
+    // Only fetches enabled post types
+}
+```
+
+✅ **Only checked post types will be collected and synced**
+
+**When Selection Matters:**
+- ✅ "Collect & Send Site Data" button - respects selections
+- ✅ Cron jobs (automatic syncs) - respects selections
+- ✅ Manual syncs from WP Admin - respects selections
+
+### 4. ✅ App "Sync Now" Button Impact Verified
+**Question:** Does the "Sync Now" button on Content Types page respect plugin settings?
+
+**Answer:** **PARTIALLY** - It respects integration config, but uses backend-stored settings:
+
+**How It Works:**
+1. Frontend calls: `/v1/integration/integrations/{id}/sync/`
+2. Backend reads integration's `config_json.content_types`
+3. Syncs based on what's **enabled in the integration record**
+
+**Important Notes:**
+- ✅ The "Sync Now" button syncs FROM WordPress TO IGNY8
+- ✅ It uses the settings stored in the integration config (backend database)
+- ⚠️ If you change plugin settings, you need to send site structure first:
+  - Click "Collect & Send Site Data" in plugin
+  - This updates the integration config in the backend
+  - Then "Sync Now" will use the new settings
+
+**Workflow:**
+```
+Plugin Settings Changed
+  ↓
+Click "Collect & Send Site Data" (updates backend config)
+  ↓
+Click "Sync Now" in App (uses updated config)
+  ↓
+Syncs with new settings
+```
+
+---
+
+## Changes Made
+
+### File 1: `admin/class-admin.php`
+
+**Change 1: Site ID Detection by Domain**
+```php
+// Before (line 278-283)
+$site_response = $api->get('/system/sites/');
+if ($site_response['success'] && !empty($site_response['results'])) {
+    $site = $site_response['results'][0]; // Takes first
+    update_option('igny8_site_id', $site['id']);
+}
+
+// After (line 278-299)
+$site_response = $api->get('/system/sites/');
+if ($site_response['success'] && !empty($site_response['results'])) {
+    $current_site_url = get_site_url();
+    $current_domain = parse_url($current_site_url, PHP_URL_HOST);
+    
+    // Try to find matching site by domain
+    $matched_site = null;
+    foreach ($site_response['results'] as $site) {
+        if (!empty($site['domain'])) {
+            $site_domain = parse_url($site['domain'], PHP_URL_HOST);
+            if ($site_domain === $current_domain) {
+                $matched_site = $site;
+                break;
+            }
+        }
+    }
+    
+    // Use matched site or fallback to first
+    if ($matched_site) {
+        update_option('igny8_site_id', $matched_site['id']);
+        error_log('IGNY8: Matched site by domain: ' . $matched_site['name']);
+    } else {
+        $site = $site_response['results'][0];
+        update_option('igny8_site_id', $site['id']);
+        error_log('IGNY8: No domain match, using first site');
+    }
+}
+```
+
+**Change 2: Allow Manual Site ID (line 63-68)**
+```php
+// Added sanitization for manual site ID entry
+register_setting('igny8_settings', 'igny8_site_id', array(
+    'type' => 'integer',
+    'sanitize_callback' => 'absint'
+));
+```
+
+### File 2: `admin/settings.php`
+
+**Change: Manual Site ID Input Field (line 210-232)**
+```php
+<?php if ($site_id) : ?>
+<tr>
+    <th scope="row"><?php _e('Site ID', 'igny8-bridge'); ?></th>
+    <td>
+        <?php echo esc_html($site_id); ?>
+        <p class="description">
+            <?php _e('Auto-detected from your IGNY8 account.', 'igny8-bridge'); ?>
+        </p>
+    </td>
+</tr>
+<?php else : ?>
+<tr>
+    <th scope="row">
+        <label for="igny8_site_id_manual"><?php _e('Site ID (Manual)', 'igny8-bridge'); ?></label>
+    </th>
+    <td>
+        <input 
+            type="number" 
+            id="igny8_site_id_manual" 
+            name="igny8_site_id" 
+            value="" 
+            class="regular-text" 
+        />
+        <p class="description">
+            <?php _e('If auto-detection failed, manually enter your IGNY8 Site ID here.', 'igny8-bridge'); ?>
+        </p>
+    </td>
+</tr>
+<?php endif; ?>
+```
+
+---
+
+## How to Deploy
+
+### Step 1: Upload Updated Files to homeg8.com
+
+Upload these 2 files via FTP/SFTP to `wp-content/plugins/igny8-wp-plugin/`:
+
+1. ✅ `admin/class-admin.php` (Site ID domain matching)
+2. ✅ `admin/settings.php` (Manual Site ID field)
+
+### Step 2: Reconnect the Plugin
+
+**Option A: Automatic (Recommended)**
+1. Go to **WordPress Admin → Settings → IGNY8 Bridge**
+2. Click "Revoke API Key" button
+3. Re-enter your email, password, and API key
+4. Click "Connect to IGNY8"
+5. Plugin should now detect Site ID correctly by matching "homeg8.com" domain
+
+**Option B: Manual (If Auto-detection Still Fails)**
+1. Go to IGNY8 app and find your Site ID:
+   - Navigate to Sites → Home & Garden Site
+   - Check the URL: `https://app.igny8.com/sites/5/...`
+   - Site ID is `5`
+2. Go to WordPress Admin → Settings → IGNY8 Bridge
+3. Scroll to "Connection Status" section
+4. If "Site ID not set", you'll see a manual input field
+5. Enter `5` (or your site ID)
+6. Click "Save Connection Settings"
+
+### Step 3: Verify Fix
+
+1. **Check Site ID:**
+   - Settings → IGNY8 Bridge
+   - "Connection Status" section should show "Site ID: 5"
+
+2. **Test Sync Operations:**
+   - Should no longer show "X Site ID not set" error
+   - Click "Collect & Send Site Data" - should work
+   - Click "Sync Posts to IGNY8" - should work
+
+3. **Check App Frontend:**
+   - Go to IGNY8 App → Sites → Home & Garden → Settings → Content Types
+   - Click "Sync Now"
+   - Should see content being synced
+
+---
+
+## Testing Checklist
+
+### Plugin Side (WordPress Admin)
+- [ ] Site ID is correctly detected and displayed
+- [ ] "Collect & Send Site Data" button works (no Site ID error)
+- [ ] "Sync Posts to IGNY8" button works
+- [ ] "Sync Taxonomies" button works
+- [ ] Taxonomy selections are saved correctly
+- [ ] Post type selections are saved correctly
+- [ ] Only selected taxonomies are synced
+- [ ] Only selected post types are synced
+
+### App Side (IGNY8 Frontend)
+- [ ] Site shows "Connected" status
+- [ ] Content Types page shows correct counts
+- [ ] "Sync Now" button triggers sync
+- [ ] Synced content appears with correct counts
+- [ ] Integration test connection succeeds
+
+---
+
+## FAQ
+
+### Q: What if Site ID is still not detected?
+**A:** Use the manual Site ID input:
+1. Find your Site ID in the app URL
+2. Enter it manually in the plugin settings
+3. Save settings
+
+### Q: Do I need to re-save taxonomy/post type selections?
+**A:** No, existing selections are preserved. Only Site ID is affected.
+
+### Q: Will this affect existing synced content?
+**A:** No, existing content is safe. This only fixes the Site ID detection.
+
+### Q: How do I find my Site ID?
+**A:** Check the IGNY8 app URL when viewing your site:
+- URL format: `https://app.igny8.com/sites/{SITE_ID}/...`
+- Example: `https://app.igny8.com/sites/5/dashboard` → Site ID is `5`
+
+### Q: Does the "Sync Now" button in the app use my plugin settings immediately?
+**A:** Not immediately. You need to:
+1. Change settings in plugin
+2. Click "Collect & Send Site Data" to update backend
+3. Then "Sync Now" will use new settings
+
+---
+
+## Summary
+
+### ✅ **What's Fixed:**
+1. Site ID now correctly detected by domain matching
+2. Manual Site ID input available as fallback
+3. Better logging for debugging
+
+### ✅ **What's Confirmed Working:**
+1. Taxonomy selection affects sync (only checked taxonomies sync)
+2. Post type selection affects sync (only checked post types sync)
+3. "Collect & Send Site Data" respects selections
+4. "Sync Now" in app uses integration config
+
+### ⚠️ **Important Workflow:**
+```
+Change Plugin Settings
+  ↓
+Click "Collect & Send Site Data" (updates backend)
+  ↓  
+Click "Sync Now" in App (uses updated settings)
+```
+
+---
+
+## Support
+
+If issues persist:
+1. Check WordPress debug log: `wp-content/debug.log`
+2. Check for error: "IGNY8: Matched site by domain: {site_name}"
+3. If no match found: "IGNY8: No domain match, using first site"
+4. Use manual Site ID input if auto-detection fails
+
diff --git a/igny8-wp-plugin/admin/class-admin.php b/igny8-wp-plugin/admin/class-admin.php
index 2b501a03..1a50b3b8 100644
--- a/igny8-wp-plugin/admin/class-admin.php
+++ b/igny8-wp-plugin/admin/class-admin.php
@@ -63,7 +63,10 @@ class Igny8Admin {
      */
     public function register_settings() {
         register_setting('igny8_settings', 'igny8_email');
-        register_setting('igny8_settings', 'igny8_site_id');
+        register_setting('igny8_settings', 'igny8_site_id', array(
+            'type' => 'integer',
+            'sanitize_callback' => 'absint'
+        ));
         register_setting('igny8_settings', 'igny8_enable_two_way_sync', array(
             'type' => 'boolean',
             'sanitize_callback' => array($this, 'sanitize_boolean'),
@@ -275,11 +278,33 @@ class Igny8Admin {
             }
         }
 
-        // Try to get site ID (if available) using the authenticated client
+        // Try to get site ID by matching current site URL
         $site_response = $api->get('/system/sites/');
         if ($site_response['success'] && !empty($site_response['results'])) {
-            $site = $site_response['results'][0];
-            update_option('igny8_site_id', $site['id']);
+            $current_site_url = get_site_url();
+            $current_domain = parse_url($current_site_url, PHP_URL_HOST);
+            
+            // Try to find matching site by domain
+            $matched_site = null;
+            foreach ($site_response['results'] as $site) {
+                if (!empty($site['domain'])) {
+                    $site_domain = parse_url($site['domain'], PHP_URL_HOST);
+                    if ($site_domain === $current_domain) {
+                        $matched_site = $site;
+                        break;
+                    }
+                }
+            }
+            
+            // Fallback to first site if no match found
+            if ($matched_site) {
+                update_option('igny8_site_id', $matched_site['id']);
+                error_log('IGNY8: Matched site by domain: ' . $matched_site['name'] . ' (ID: ' . $matched_site['id'] . ')');
+            } else {
+                $site = $site_response['results'][0];
+                update_option('igny8_site_id', $site['id']);
+                error_log('IGNY8: No domain match, using first site: ' . $site['name'] . ' (ID: ' . $site['id'] . ')');
+            }
         }
 
         add_settings_error(
diff --git a/igny8-wp-plugin/admin/settings.php b/igny8-wp-plugin/admin/settings.php
index cc2063ba..40a2273f 100644
--- a/igny8-wp-plugin/admin/settings.php
+++ b/igny8-wp-plugin/admin/settings.php
@@ -214,7 +214,30 @@ $webhook_logs = igny8_get_webhook_logs(array('limit' => 10));
                     <?php if ($site_id) : ?>
                     <tr>
                         <th scope="row"><?php _e('Site ID', 'igny8-bridge'); ?></th>
-                        <td><?php echo esc_html($site_id); ?></td>
+                        <td>
+                            <?php echo esc_html($site_id); ?>
+                            <p class="description">
+                                <?php _e('Auto-detected from your IGNY8 account. If incorrect, reconnect or manually enter below.', 'igny8-bridge'); ?>
+                            </p>
+                        </td>
+                    </tr>
+                    <?php else : ?>
+                    <tr>
+                        <th scope="row">
+                            <label for="igny8_site_id_manual"><?php _e('Site ID (Manual)', 'igny8-bridge'); ?></label>
+                        </th>
+                        <td>
+                            <input 
+                                type="number" 
+                                id="igny8_site_id_manual" 
+                                name="igny8_site_id" 
+                                value="" 
+                                class="regular-text" 
+                            />
+                            <p class="description">
+                                <?php _e('If auto-detection failed, manually enter your IGNY8 Site ID here. You can find it in the IGNY8 app URL: /sites/{site_id}/...', 'igny8-bridge'); ?>
+                            </p>
+                        </td>
                     </tr>
                     <?php endif; ?>
                 </table>