added modify invoice framework

app/Http/Controllers/MiningTaxes/MiningTaxesAdminController.php

@@ -74,6 +74,20 @@ class MiningTaxesAdminController extends Controller
         return view('miningtax.admin.display.unpaid')->with('error', 'No invoices found');
     }
 
+    /**
+     * Display page to modify an unpaid invoice
+     */
+    public function DisplayModifyInvoice() {
+
+    }
+
+    /**
+     * Modify an unpaid invoice
+     */
+    public function ProcessModifyInvoice() {
+        
+    }
+
     /**
      * Mark an invoice paid
      */