diff --git a/APP/src/app/features/payee1099/pages/payee-1099-page/payee-1099-page.component.html b/APP/src/app/features/payee1099/pages/payee-1099-page/payee-1099-page.component.html
index 214bcb8..7862460 100644
--- a/APP/src/app/features/payee1099/pages/payee-1099-page/payee-1099-page.component.html
+++ b/APP/src/app/features/payee1099/pages/payee-1099-page/payee-1099-page.component.html
@@ -103,6 +103,12 @@
         <kendo-textbox [(ngModel)]="form.tin"
           [placeholder]="editingId != null && editingTinLast4 ? '***-**-' + editingTinLast4 : ''"></kendo-textbox>
         <span *ngIf="editingId != null" class="hint-text-sm">Leave blank to keep the existing TIN / 留空則保留現有稅號</span>
+        <div *ngIf="editingId != null" class="flex flex-col gap-1">
+          <button kendoButton type="button" fillMode="link" class="self-start"
+            *appHasPermission="{ module: 'Form1099', action: 'write' }"
+            (click)="revealTin()">Reveal full TIN / 顯示完整 TIN</button>
+          <span *ngIf="revealedTin" class="font-mono">{{ revealedTin }}</span>
+        </div>
       </label>
 
       <label class="flex flex-col gap-1 md:col-span-2">