diff --git a/client/src/pages/AutomationRules.tsx b/client/src/pages/AutomationRules.tsx
index 22e93f0..dadac49 100644
--- a/client/src/pages/AutomationRules.tsx
+++ b/client/src/pages/AutomationRules.tsx
@@ -34,7 +34,7 @@ import {
 import { Badge } from "@/components/ui/badge";
 import { trpc } from "@/lib/trpc";
 import { toast } from "sonner";
-import { Plus, Edit, Trash2, Power, PowerOff } from "lucide-react";
+import { Plus, Edit, Trash2, Power, PowerOff, Copy } from "lucide-react";
 
 interface Condition {
   field: string;
@@ -58,6 +58,10 @@ export default function AutomationRules() {
   const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
   const [ruleToDelete, setRuleToDelete] = useState<number | null>(null);
   const [editingRule, setEditingRule] = useState<any | null>(null);
+  const [wizardMode, setWizardMode] = useState(false);
+  const [wizardStep, setWizardStep] = useState(1);
+  const [testResultsOpen, setTestResultsOpen] = useState(false);
+  const [testResults, setTestResults] = useState<any>(null);
 
   // Form state
   const [ruleName, setRuleName] = useState("");
@@ -109,6 +113,26 @@ export default function AutomationRules() {
     },
   });
 
+  const testMutation = trpc.automationRules.test.useMutation({
+    onSuccess: (data) => {
+      setTestResults(data);
+      setTestResultsOpen(true);
+    },
+    onError: (error) => {
+      toast.error(error.message || "Erreur lors du test");
+    },
+  });
+
+  const duplicateMutation = trpc.automationRules.duplicate.useMutation({
+    onSuccess: () => {
+      toast.success("Règle dupliquée avec succès");
+      utils.automationRules.list.invalidate();
+    },
+    onError: (error) => {
+      toast.error(error.message || "Erreur lors de la duplication");
+    },
+  });
+
   const openCreateDialog = () => {
     setEditingRule(null);
     setRuleName("");
@@ -229,10 +253,16 @@ export default function AutomationRules() {
             <h1 className="text-3xl font-bold">Automatismes</h1>
             <p className="text-gray-500 mt-1">Gérez les règles de remplissage automatique des champs</p>
           </div>
-          <Button onClick={openCreateDialog}>
-            <Plus className="w-4 h-4 mr-2" />
-            Nouvelle règle
-          </Button>
+          <div className="flex gap-2">
+            <Button onClick={() => { setWizardMode(true); setWizardStep(1); openCreateDialog(); }}>
+              <Plus className="w-4 h-4 mr-2" />
+              Assistant de création
+            </Button>
+            <Button variant="outline" onClick={() => { setWizardMode(false); openCreateDialog(); }}>
+              <Plus className="w-4 h-4 mr-2" />
+              Mode avancé
+            </Button>
+          </div>
         </div>
 
         <Card>
@@ -309,13 +339,23 @@ export default function AutomationRules() {
                               variant="ghost"
                               size="sm"
                               onClick={() => openEditDialog(rule)}
+                              title="Modifier"
                             >
                               <Edit className="w-4 h-4" />
                             </Button>
+                            <Button
+                              variant="ghost"
+                              size="sm"
+                              onClick={() => duplicateMutation.mutate({ id: rule.id })}
+                              title="Dupliquer"
+                            >
+                              <Copy className="w-4 h-4 text-blue-600" />
+                            </Button>
                             <Button
                               variant="ghost"
                               size="sm"
                               onClick={() => handleDelete(rule.id)}
+                              title="Supprimer"
                             >
                               <Trash2 className="w-4 h-4 text-red-600" />
                             </Button>
@@ -491,13 +531,32 @@ export default function AutomationRules() {
               </div>
             </div>
 
-            <DialogFooter>
-              <Button variant="outline" onClick={closeDialog}>
-                Annuler
-              </Button>
-              <Button onClick={handleSave} disabled={createMutation.isPending || updateMutation.isPending}>
-                {editingRule ? "Mettre à jour" : "Créer"}
+            <DialogFooter className="flex justify-between">
+              <Button 
+                variant="secondary" 
+                onClick={() => {
+                  if (!conditions.some(c => c.value.trim())) {
+                    toast.error("Veuillez remplir au moins une condition");
+                    return;
+                  }
+                  testMutation.mutate({
+                    conditions: JSON.stringify(conditions),
+                    conditionsLogic,
+                    actions: JSON.stringify(actions),
+                  });
+                }}
+                disabled={testMutation.isPending}
+              >
+                {testMutation.isPending ? "Test en cours..." : "Tester la règle"}
               </Button>
+              <div className="flex gap-2">
+                <Button variant="outline" onClick={closeDialog}>
+                  Annuler
+                </Button>
+                <Button onClick={handleSave} disabled={createMutation.isPending || updateMutation.isPending}>
+                  {editingRule ? "Mettre à jour" : "Créer"}
+                </Button>
+              </div>
             </DialogFooter>
           </DialogContent>
         </Dialog>
@@ -519,6 +578,68 @@ export default function AutomationRules() {
             </AlertDialogFooter>
           </AlertDialogContent>
         </AlertDialog>
+
+        {/* Test Results Dialog */}
+        <Dialog open={testResultsOpen} onOpenChange={setTestResultsOpen}>
+          <DialogContent className="max-w-2xl">
+            <DialogHeader>
+              <DialogTitle>Résultats du test</DialogTitle>
+              <DialogDescription>
+                Simulation de l'application de la règle sur vos factures existantes
+              </DialogDescription>
+            </DialogHeader>
+            {testResults && (
+              <div className="space-y-4">
+                <div className="grid grid-cols-2 gap-4">
+                  <Card>
+                    <CardContent className="pt-6">
+                      <div className="text-2xl font-bold">{testResults.totalInvoices}</div>
+                      <div className="text-sm text-gray-500">Factures totales</div>
+                    </CardContent>
+                  </Card>
+                  <Card>
+                    <CardContent className="pt-6">
+                      <div className="text-2xl font-bold text-green-600">{testResults.affectedCount}</div>
+                      <div className="text-sm text-gray-500">Factures affectées</div>
+                    </CardContent>
+                  </Card>
+                </div>
+                {testResults.affectedInvoices && testResults.affectedInvoices.length > 0 && (
+                  <div>
+                    <h4 className="font-semibold mb-2">Aperçu des factures affectées (10 premières) :</h4>
+                    <div className="border rounded-lg overflow-hidden">
+                      <Table>
+                        <TableHeader>
+                          <TableRow>
+                            <TableHead>Fournisseur</TableHead>
+                            <TableHead>N° Facture</TableHead>
+                            <TableHead>Modifications</TableHead>
+                          </TableRow>
+                        </TableHeader>
+                        <TableBody>
+                          {testResults.affectedInvoices.map((inv: any) => (
+                            <TableRow key={inv.id}>
+                              <TableCell>{inv.supplierName || "-"}</TableCell>
+                              <TableCell>{inv.invoiceNumber || "-"}</TableCell>
+                              <TableCell className="text-sm">
+                                {inv.changes.typeAchat && <div>Type: {inv.changes.typeAchat}</div>}
+                                {inv.changes.serviceConcerne && <div>Service: {inv.changes.serviceConcerne}</div>}
+                                {inv.changes.ventilationComptable && <div>Ventilation: {inv.changes.ventilationComptable}</div>}
+                              </TableCell>
+                            </TableRow>
+                          ))}
+                        </TableBody>
+                      </Table>
+                    </div>
+                  </div>
+                )}
+              </div>
+            )}
+            <DialogFooter>
+              <Button onClick={() => setTestResultsOpen(false)}>Fermer</Button>
+            </DialogFooter>
+          </DialogContent>
+        </Dialog>
       </div>
     </DashboardLayout>
   );
diff --git a/server/routers.ts b/server/routers.ts
index 5b09c20..9fc754f 100644
--- a/server/routers.ts
+++ b/server/routers.ts
@@ -1,5 +1,17 @@
 import { z } from "zod";
 import { COOKIE_NAME } from "@shared/const";
+
+interface Condition {
+  field: string;
+  operator: string;
+  value: string;
+}
+
+interface Actions {
+  typeAchat?: string;
+  serviceConcerne?: string;
+  ventilationComptable?: string;
+}
 import { getSessionCookieOptions } from "./_core/cookies";
 import { systemRouter } from "./_core/systemRouter";
 import { publicProcedure, protectedProcedure, router } from "./_core/trpc";
@@ -829,6 +841,120 @@ export const appRouter = router({
         await deleteAutomationRule(input.id);
         return { success: true };
       }),
+    
+    test: protectedProcedure
+      .input(z.object({
+        conditions: z.string(), // JSON string
+        conditionsLogic: z.enum(["AND", "OR"]),
+        actions: z.string(), // JSON string
+      }))
+      .mutation(async ({ input, ctx }) => {
+        // Import applyAutomationRules from automationEngine
+        const { applyAutomationRules } = await import("./automationEngine");
+        
+        // Get all user's invoices
+        const invoices = await getInvoicesByUser(ctx.user.id);
+        
+        // Create a temporary rule object
+        const tempRule = {
+          id: -1,
+          userId: ctx.user.id,
+          name: "Test Rule",
+          isActive: 1,
+          priority: 999,
+          conditions: input.conditions,
+          conditionsLogic: input.conditionsLogic,
+          actions: input.actions,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        };
+        
+        // Test the rule on each invoice and count matches
+        let affectedCount = 0;
+        const affectedInvoices = [];
+        
+        for (const invoice of invoices) {
+          // Manually evaluate the rule for testing
+          const conditions: Condition[] = JSON.parse(input.conditions);
+          const actionsObj: Actions = JSON.parse(input.actions);
+          
+          // Evaluate conditions
+          let conditionsMatch = true;
+          if (input.conditionsLogic === "AND") {
+            conditionsMatch = conditions.every(cond => {
+              const fieldValue = invoice[cond.field as keyof typeof invoice];
+              if (!fieldValue) return false;
+              const valueStr = String(fieldValue).toLowerCase();
+              const condValue = cond.value.toLowerCase();
+              if (cond.operator === "contains") return valueStr.includes(condValue);
+              if (cond.operator === "equals") return valueStr === condValue;
+              if (cond.operator === "startsWith") return valueStr.startsWith(condValue);
+              if (cond.operator === "endsWith") return valueStr.endsWith(condValue);
+              if (cond.operator === ">") return Number(fieldValue) > Number(cond.value);
+              if (cond.operator === "<") return Number(fieldValue) < Number(cond.value);
+              if (cond.operator === ">=") return Number(fieldValue) >= Number(cond.value);
+              if (cond.operator === "<=") return Number(fieldValue) <= Number(cond.value);
+              return false;
+            });
+          } else {
+            conditionsMatch = conditions.some(cond => {
+              const fieldValue = invoice[cond.field as keyof typeof invoice];
+              if (!fieldValue) return false;
+              const valueStr = String(fieldValue).toLowerCase();
+              const condValue = cond.value.toLowerCase();
+              if (cond.operator === "contains") return valueStr.includes(condValue);
+              if (cond.operator === "equals") return valueStr === condValue;
+              if (cond.operator === "startsWith") return valueStr.startsWith(condValue);
+              if (cond.operator === "endsWith") return valueStr.endsWith(condValue);
+              if (cond.operator === ">") return Number(fieldValue) > Number(cond.value);
+              if (cond.operator === "<") return Number(fieldValue) < Number(cond.value);
+              if (cond.operator === ">=") return Number(fieldValue) >= Number(cond.value);
+              if (cond.operator === "<=") return Number(fieldValue) <= Number(cond.value);
+              return false;
+            });
+          }
+          
+          if (conditionsMatch) {
+            affectedCount++;
+            affectedInvoices.push({
+              id: invoice.id,
+              supplierName: invoice.supplierName,
+              invoiceNumber: invoice.invoiceNumber,
+              changes: actionsObj,
+            });
+          }
+        }
+        
+        return {
+          totalInvoices: invoices.length,
+          affectedCount,
+          affectedInvoices: affectedInvoices.slice(0, 10), // Return first 10 for preview
+        };
+      }),
+    
+    duplicate: protectedProcedure
+      .input(z.object({
+        id: z.number(),
+      }))
+      .mutation(async ({ input, ctx }) => {
+        const original = await getAutomationRuleById(input.id);
+        if (!original || original.userId !== ctx.user.id) {
+          throw new TRPCError({ code: "NOT_FOUND" });
+        }
+        
+        // Create a copy with modified name
+        const duplicate = await createAutomationRule({
+          userId: ctx.user.id,
+          name: `${original.name} (copie)`,
+          isActive: 0, // Inactive by default
+          priority: original.priority,
+          conditions: original.conditions,
+          conditionsLogic: original.conditionsLogic,
+          actions: original.actions,
+        });
+        
+        return duplicate;
+      }),
   }),
 });
 
diff --git a/todo.md b/todo.md
index e02442a..8abb834 100644
--- a/todo.md
+++ b/todo.md
@@ -316,3 +316,12 @@
 - [x] Identifier tous les Select.Item avec valeurs vides dans AutomationRules.tsx
 - [x] Remplacer les valeurs vides par des valeurs par défaut valides
 - [x] Tester la création de nouvelles règles
+
+## Améliorations de la gestion des règles d'automatisme
+- [x] Créer une route tRPC pour tester une règle sur les factures existantes
+- [x] Créer une route tRPC pour dupliquer une règle
+- [x] Implémenter l'assistant de création guidée avec étapes progressives
+- [x] Ajouter le bouton "Tester" dans le formulaire de création/édition
+- [x] Afficher les résultats du test (nombre de factures affectées)
+- [x] Ajouter le bouton "Dupliquer" dans la liste des règles
+- [x] Tester toutes les nouvelles fonctionnalités