diff --git a/src/views/payment/invoice-application-form.vue b/src/views/payment/invoice-application-form.vue
index 8c6d212..5a8df00 100644
--- a/src/views/payment/invoice-application-form.vue
+++ b/src/views/payment/invoice-application-form.vue
@@ -497,6 +497,7 @@ const emptyLine = () => ({
   localId: ++localId,
   goodsCategory: '',
   goodsName: '',
+  taxClassificationCode: '',
   unit: '吨',
   quantity: 0,
   unitPriceNoTax: 0,
@@ -724,9 +725,11 @@ export default {
       const item = this.findInvoiceItem(line);
       if (item) {
         line.taxRate = Number(item.defaultTaxRate || 0);
+        line.taxClassificationCode = item.taxClassificationCode || '';
       } else if (clearInvalid) {
         line.goodsName = '';
         line.taxRate = 0;
+        line.taxClassificationCode = '';
       }
       this.recalculateLine(line);
     },
@@ -734,6 +737,7 @@ export default {
       const names = this.invoiceItemNames(line.goodsCategory);
       if (!names.some(item => item.shortName === line.goodsName)) line.goodsName = '';
       line.taxRate = 0;
+      line.taxClassificationCode = this.findInvoiceItem(line)?.taxClassificationCode || '';
       if (names.length === 1) {
         line.goodsName = names[0].shortName;
         this.handleGoodsNameChange(line);
@@ -743,9 +747,11 @@ export default {
       const item = this.findInvoiceItem(line);
       if (!item) {
         line.taxRate = 0;
+        line.taxClassificationCode = '';
         return;
       }
       line.taxRate = Number(item.defaultTaxRate || 0);
+      line.taxClassificationCode = item.taxClassificationCode || '';
       this.recalculateLine(line);
     },
     validateSettlements(rule, value, callback) {
@@ -1141,6 +1147,7 @@ export default {
           lines: sheet.lines.map(line => ({
             goodsCategory: line.goodsCategory,
             goodsName: line.goodsName,
+            taxClassificationCode: line.taxClassificationCode,
             unit: line.unit,
             quantity: line.quantity,
             unitPriceNoTax: line.unitPriceNoTax,