diff --git a/app/routes/assets.py b/app/routes/assets.py
index c416646..2a62418 100644
--- a/app/routes/assets.py
+++ b/app/routes/assets.py
@@ -95,8 +95,9 @@ def create():
             return render_template('assets/form.html', asset=None,
                                    asset_types=ASSET_TYPES, asset_statuses=ASSET_STATUSES)
 
-        service_tag = request.form.get('service_tag', '').strip() or None
-        if service_tag and Asset.query.filter_by(service_tag=service_tag).first():
+        # Service tag mirrors the serial number (same identifier)
+        service_tag = sn
+        if Asset.query.filter(Asset.service_tag == service_tag, Asset.serial_number != sn).first():
             flash(f'An asset with service tag {service_tag} already exists.', 'danger')
             return render_template('assets/form.html', asset=None,
                                    asset_types=ASSET_TYPES, asset_statuses=ASSET_STATUSES)
@@ -223,7 +224,7 @@ def edit(asset_id):
                                        asset_types=ASSET_TYPES, asset_statuses=ASSET_STATUSES)
 
         asset.serial_number = new_sn
-        asset.service_tag = request.form.get('service_tag', '').strip() or None
+        asset.service_tag = new_sn  # service tag mirrors serial number
         asset.asset_tag = request.form.get('asset_tag', '').strip() or None
         asset.asset_type = request.form.get('asset_type', asset.asset_type)
         asset.brand = request.form.get('brand', '').strip() or None
diff --git a/app/templates/assets/form.html b/app/templates/assets/form.html
index a08e7c5..cffe75a 100644
--- a/app/templates/assets/form.html
+++ b/app/templates/assets/form.html
@@ -23,18 +23,14 @@
 
       <h6 class="text-uppercase text-muted mb-3 small">Identifiers</h6>
       <div class="row g-3 mb-3">
-        <div class="col-md-4">
-          <label class="form-label">Serial Number <span class="text-danger">*</span></label>
+        <div class="col-md-6">
+          <label class="form-label">Service Tag / Serial Number <span class="text-danger">*</span></label>
           <input type="text" name="serial_number" class="form-control"
-                 value="{{ asset.serial_number if asset else (prefill.serial_number if prefill else '') }}" required>
+                 value="{{ asset.service_tag or asset.serial_number if asset else (prefill.service_tag or prefill.serial_number if prefill else '') }}"
+                 placeholder="e.g. ABC1234" required>
+          <div class="form-text">Used as both the service tag and serial number.</div>
         </div>
-        <div class="col-md-4">
-          <label class="form-label">Service Tag</label>
-          <input type="text" name="service_tag" class="form-control"
-                 value="{{ asset.service_tag or '' if asset else (prefill.service_tag if prefill else '') }}"
-                 placeholder="e.g. Dell service tag">
-        </div>
-        <div class="col-md-4">
+        <div class="col-md-6">
           <label class="form-label">Asset Tag</label>
           <input type="text" name="asset_tag" class="form-control"
                  value="{{ asset.asset_tag or '' if asset else '' }}"
diff --git a/info.txt b/info.txt
index e69de29..e4399b0 100644
--- a/info.txt
+++ b/info.txt
@@ -0,0 +1,6 @@
+With free API key (~5 min setup):
+The form fills completely automatically — model, warranty date, purchase date, serial number, all at once. To get it:
+
+Go to tdm.dell.com → sign in with a free Dell account
+Go to API Services → Create new application
+Add DELL_CLIENT_ID=... and DELL_CLIENT_SECRET=... to your .env — done