diff --git a/app/model/Deduction.php b/app/model/Deduction.php
index fd8d776..8da4754 100644
--- a/app/model/Deduction.php
+++ b/app/model/Deduction.php
@@ -19,4 +19,8 @@ class Deduction extends Base
     {
         return $this->hasOne(CouponMain::class,"id","coupon_main_id");
     }
+    public function bill()
+    {
+        return $this->hasOne(Bill::class,"id","bill_id");
+    }
 }
\ No newline at end of file