diff --git a/taxes_az/taxes_az/doctype/declaration_of_value_added_tax/declaration_of_value_added_tax.js b/taxes_az/taxes_az/doctype/declaration_of_value_added_tax/declaration_of_value_added_tax.js
index 246f512..794cf66 100644
--- a/taxes_az/taxes_az/doctype/declaration_of_value_added_tax/declaration_of_value_added_tax.js
+++ b/taxes_az/taxes_az/doctype/declaration_of_value_added_tax/declaration_of_value_added_tax.js
@@ -300,9 +300,11 @@ if (!frappe.__vc_call_wrapped) {
     frappe.call = function (opts) {
         var m = (opts && opts.method) || (typeof opts === "string" ? opts : "");
         var fill = VC.re.test(m || "");
-        if (fill) { VC.n++; VC.mode = true; }
         var ret = _vc_call.apply(this, arguments);
+        // Only enter fill mode if we can also observe completion — otherwise mode would
+        // stick on forever and stop every recompute.
         if (fill && ret && typeof ret.then === "function") {
+            VC.n++; VC.mode = true;
             var done = function () {
                 if (--VC.n > 0) return;                        // other fill calls still running
                 VC.n = 0;