this is how the next step looks like

src/components/cost-estimator/cost-estimator-form.tsx

@@ -9,7 +9,8 @@ import { Step5PageCount } from './step-5-page-count';
 import { Step6Animations } from './step-6-animations';
 import { Step7Illustrations } from './step-7-illustrations';
 import { Step8Branding } from './step-8-branding';
-import { Step9Results, calculateTotalHours } from './step-9-results';
+import { Step9AdditionalFeatures } from './step-9-additional-features';
+import { Step10Results, calculateTotalHours } from './step-10-results';
 import { Card, CardContent } from '@/components/ui/card';
 import { AnimatePresence, motion } from 'framer-motion';
 
@@ -31,6 +32,7 @@ export type FormData = {
   animatedElements: boolean | null;
   illustrations: IllustrationSelection;
   branding: BrandingSelection;
+  additionalFeatures: string[];
 };
 
 export function CostEstimatorForm() {
@@ -49,6 +51,7 @@ export function CostEstimatorForm() {
       is3dAnimated: null,
     },
     branding: null,
+    additionalFeatures: [],
   });
   const [isPending, startTransition] = useTransition();
 
@@ -83,6 +86,7 @@ export function CostEstimatorForm() {
           is3dAnimated: null,
         },
         branding: null,
+        additionalFeatures: [],
     });
     setCurrentStep(1);
   }
@@ -164,7 +168,16 @@ export function CostEstimatorForm() {
         );
       case 9:
         return (
-            <Step9Results
+          <Step9AdditionalFeatures
+            onNext={handleNextStep}
+            onBack={handlePrevStep}
+            onUpdateData={handleUpdateFormData}
+            formData={formData}
+          />
+        );
+      case 10:
+        return (
+            <Step10Results
                 formData={formData}
                 onReset={handleReset}
                 estimatedHours={estimatedHours}