diff --git a/src/pages/dashboard/receipt-issuing-order/custom/hello-techno/hooks/useInputReceiptStep.tsx b/src/pages/dashboard/receipt-issuing-order/custom/hello-techno/hooks/useInputReceiptStep.tsx
index 76b2bc1..628a1a6 100644
--- a/src/pages/dashboard/receipt-issuing-order/custom/hello-techno/hooks/useInputReceiptStep.tsx
+++ b/src/pages/dashboard/receipt-issuing-order/custom/hello-techno/hooks/useInputReceiptStep.tsx
@@ -92,6 +92,7 @@ export default function useInputReceiptStep({ onNext, onPrev }: Props) {
   };
 
   const setTax = () => {
+    if (adjustData !== null) return;
     const tax = String(calcInnerTax(Number(amount)));
     if (tax) {
       form.setValue("tax_amount", tax);