diff --git a/mhd_bms/src/main/java/com/mhd/bms/application/server/businessDocument/BusinessDocumentApplicationService.java b/mhd_bms/src/main/java/com/mhd/bms/application/server/businessDocument/BusinessDocumentApplicationService.java
index ad261c128..3b09fb4ff 100644
--- a/mhd_bms/src/main/java/com/mhd/bms/application/server/businessDocument/BusinessDocumentApplicationService.java
+++ b/mhd_bms/src/main/java/com/mhd/bms/application/server/businessDocument/BusinessDocumentApplicationService.java
@@ -327,11 +327,10 @@ public class BusinessDocumentApplicationService {
         BigDecimal billAmountSettlement = billManage.getBillAmountSettlement();
         BigDecimal subtract = billTotalAmount.subtract(billAmountSettlement);
         billManage.setBillAmountUnsettled(subtract);
-        Double taxRate = billManage.getTaxRate() != null ? billManage.getTaxRate() : 0.0;
-        BigDecimal taxAmount = billTotalAmount.divide(BigDecimal.ONE.add(new BigDecimal(taxRate).divide(BigDecimal.valueOf(100))),10, BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal(taxRate).divide(BigDecimal.valueOf(100))).setScale(2, BigDecimal.ROUND_HALF_UP);
-        BigDecimal taxFreeFee = billTotalAmount.subtract(taxAmount);
-        billManage.setTaxAmount(taxAmount);
-        billManage.setTaxFreeFee(taxFreeFee);
+        BigDecimal taxAmount = billManage.getTaxAmount();
+        billManage.setTaxAmount(taxAmount.add(billDetail.getTaxAmount()));
+        BigDecimal taxFreeFee = billManage.getTaxFreeFee();
+        billManage.setTaxFreeFee(taxFreeFee.add(billDetail.getTaxFreeFee()));
         billManageService.updateById(billManage);
         return true;
     }