diff --git a/adm/shop_admin/orderpartcancel.php b/adm/shop_admin/orderpartcancel.php
index 47018b0e4..55df2c5a3 100644
--- a/adm/shop_admin/orderpartcancel.php
+++ b/adm/shop_admin/orderpartcancel.php
@@ -49,12 +49,10 @@ $od_misu = abs($od['od_misu']);
             <th scope="row"><label for="mod_tax_mny">과세 취소금액</label></th>
             <td><input type="text" name="mod_tax_mny" value="" id="mod_tax_mny" class="frm_input"> 원</td>
         </tr>
-        <?php if($od['od_pg'] != 'KAKAOPAY') { ?>
         <tr>
             <th scope="row"><label for="mod_free_mny">비과세 취소금액</label></th>
             <td><input type="text" name="mod_free_mny" value="" id="mod_free_mny" class="frm_input"> 원</td>
         </tr>
-        <?php } ?>
         <tr>
             <th scope="row"><label for="mod_memo">요청사유</label></th>
             <td><input type="text" name="mod_memo" id="mod_memo" required class="required frm_input" size="50"></td>
diff --git a/mobile/shop/orderform.sub.php b/mobile/shop/orderform.sub.php
index 2c531f740..a5387de71 100644
--- a/mobile/shop/orderform.sub.php
+++ b/mobile/shop/orderform.sub.php
@@ -1174,6 +1174,10 @@ function pay_approval()
 
     // 카카오페이 지불
     if(settle_method == "KAKAOPAY") {
+        <?php if($default['de_tax_flag_use']) { ?>
+        pf.SupplyAmt.value = parseInt(pf.comm_tax_mny.value) + parseInt(pf.comm_free_mny.value);
+        pf.GoodsVat.value  = parseInt(pf.comm_vat_mny.value);
+        <?php } ?>
         pf.good_mny.value = f.good_mny.value;
         getTxnId(pf);
         return false;
diff --git a/mobile/shop/orderformupdate.php b/mobile/shop/orderformupdate.php
index d6e420b8d..66cea39f2 100644
--- a/mobile/shop/orderformupdate.php
+++ b/mobile/shop/orderformupdate.php
@@ -485,7 +485,7 @@ if($escw_yn == 'Y')
 $od_tax_mny = round($i_price / 1.1);
 $od_vat_mny = $i_price - $od_tax_mny;
 $od_free_mny = 0;
-if($default['de_tax_flag_use'] && $od_pg != 'KAKAOPAY') {
+if($default['de_tax_flag_use']) {
     $od_tax_mny = (int)$_POST['comm_tax_mny'];
     $od_vat_mny = (int)$_POST['comm_vat_mny'];
     $od_free_mny = (int)$_POST['comm_free_mny'];
@@ -513,9 +513,6 @@ $od_memo          = clean_xss_tags($od_memo);
 $od_deposit_name  = clean_xss_tags($od_deposit_name);
 $od_tax_flag      = $default['de_tax_flag_use'];
 
-if($od_tax_flag && $od_pg == 'KAKAOPAY')
-    $od_tax_flag = 0;
-
 // 주문서에 입력
 $sql = " insert {$g5['g5_shop_order_table']}
             set od_id             = '$od_id',
diff --git a/shop/inicis/orderpartcancel.inc.php b/shop/inicis/orderpartcancel.inc.php
index 23d127167..816e3caef 100644
--- a/shop/inicis/orderpartcancel.inc.php
+++ b/shop/inicis/orderpartcancel.inc.php
@@ -5,15 +5,15 @@ if($od['od_pg'] != 'inicis') return;
 
 include_once(G5_SHOP_PATH.'/settle_inicis.inc.php');
 
-$od_tax_mny = round((int)$mod_tax_mny / 1.1);
+$vat_mny       = round((int)$tax_mny / 1.1);
 
 $currency      = 'WON';
 $oldtid        = $od['od_tno'];
-$price         = (int)$mod_tax_mny + (int)$mod_free_mny;
+$price         = (int)$tax_mny + (int)$free_mny;
 $confirm_price = (int)$od['od_receipt_price'] - (int)$od['od_refund_price'] - $price;
 $buyeremail    = $od['od_email'];
-$tax           = (int)$mod_tax_mny - $od_tax_mny;
-$taxfree       = (int)$mod_free_mny;
+$tax           = (int)$tax_mny - $vat_mny;
+$taxfree       = (int)$free_mny;
 
 /***********************
  * 3. 재승인 정보 설정 *
diff --git a/shop/kakaopay/getTxnId.php b/shop/kakaopay/getTxnId.php
index fd941fa81..f43b796d9 100644
--- a/shop/kakaopay/getTxnId.php
+++ b/shop/kakaopay/getTxnId.php
@@ -18,30 +18,37 @@ $kmFunc = new kmpayFunc($LogDir);
 $kmFunc->setPhpVersion($phpVersion);
 
 // TXN_ID를 요청하기 위한 PARAMETERR
-$REQUESTDEALAPPROVEURL = KMPayRequest("requestDealApproveUrl");	//인증 요청 경로
-$PR_TYPE = KMPayRequest("prType");												//결제 요청 타입
-$MERCHANT_ID = KMPayRequest("MID");											//가맹점 ID
-$MERCHANT_TXN_NUM = KMPayRequest("merchantTxnNum");				//가맹점 거래번호
+$REQUESTDEALAPPROVEURL = KMPayRequest("requestDealApproveUrl"); //인증 요청 경로
+$PR_TYPE = KMPayRequest("prType");                              //결제 요청 타입
+$MERCHANT_ID = KMPayRequest("MID");                             //가맹점 ID
+$MERCHANT_TXN_NUM = KMPayRequest("merchantTxnNum");             //가맹점 거래번호
 $channelType = KMPayRequest("channelType");
-$PRODUCT_NAME = KMPayRequest("GoodsName");								//상품명
-$AMOUNT = KMPayRequest("Amt");												//상품금액(총거래금액) (총거래금액 = 공급가액 + 부가세 + 봉사료)
+$PRODUCT_NAME = KMPayRequest("GoodsName");                      //상품명
+$AMOUNT = KMPayRequest("Amt");                                  //상품금액(총거래금액) (총거래금액 = 공급가액 + 부가세 + 봉사료)
 
-$CURRENCY = KMPayRequest("currency");											//거래통화(KRW/USD/JPY 등)
-$RETURN_URL = KMPayRequest("returnUrl");										//결제승인결과전송URL
-$CERTIFIED_FLAG = KMPayRequest("CERTIFIED_FLAG");							//가맹점 인증 구분값 ("N","NC")
+$CURRENCY = KMPayRequest("currency");                           //거래통화(KRW/USD/JPY 등)
+$RETURN_URL = KMPayRequest("returnUrl");                        //결제승인결과전송URL
+$CERTIFIED_FLAG = KMPayRequest("CERTIFIED_FLAG");               //가맹점 인증 구분값 ("N","NC")
 
-$OFFER_PERIOD_FLAG = KMPayRequest("OFFER_PERIOD_FLAG");							//상품제공기간 플래그
-$OFFER_PERIOD = KMPayRequest("OFFER_PERIOD");							//상품제공기간
+$OFFER_PERIOD_FLAG = KMPayRequest("OFFER_PERIOD_FLAG");         //상품제공기간 플래그
+$OFFER_PERIOD = KMPayRequest("OFFER_PERIOD");                   //상품제공기간
 
 
 //무이자옵션
-$NOINTYN = KMPayRequest("noIntYN");											//무이자 설정
-$NOINTOPT = KMPayRequest("noIntOpt");										//무이자 옵션
-$MAX_INT =KMPayRequest("maxInt");												//최대할부개월
-$FIXEDINT = KMPayRequest("fixedInt");												//고정할부개월
-$POINT_USE_YN = KMPayRequest("pointUseYn");								//카드사포인트사용여부
-$POSSICARD = KMPayRequest("possiCard");										//결제가능카드설정
-$BLOCK_CARD = KMPayRequest("blockCard");									//금지카드설정
+$NOINTYN = KMPayRequest("noIntYN");                             //무이자 설정
+$NOINTOPT = KMPayRequest("noIntOpt");                           //무이자 옵션
+$MAX_INT =KMPayRequest("maxInt");                               //최대할부개월
+$FIXEDINT = KMPayRequest("fixedInt");                           //고정할부개월
+$POINT_USE_YN = KMPayRequest("pointUseYn");                     //카드사포인트사용여부
+$POSSICARD = KMPayRequest("possiCard");                         //결제가능카드설정
+$BLOCK_CARD = KMPayRequest("blockCard");                        //금지카드설정
+
+// 복합과세
+if($default['de_tax_flag_use']) {
+    $SUPPLY_AMT  = KMPayRequest("SupplyAmt");                   // 공급가액
+    $GOODS_VAT   = KMPayRequest("GoodsVat");                    // 부가가치세
+    $SERVICE_AMT = KMPayRequest("ServiceAmt");                  // 봉사료
+}
 
 // ENC KEY와 HASH KEY는 가맹점에서 생성한 KEY 로 SETTING 한다.
 $merchantEncKey = KMPayRequest("merchantEncKey");
@@ -77,6 +84,13 @@ $strJsonString->setValue("POINT_USE_YN", $POINT_USE_YN);
 $strJsonString->setValue("POSSI_CARD", $POSSICARD);
 $strJsonString->setValue("BLOCK_CARD", $BLOCK_CARD);
 
+// 복합과세
+if($default['de_tax_flag_use']) {
+    $strJsonString->setValue("SUPPLY_AMT",  $SUPPLY_AMT);
+    $strJsonString->setValue("GOODS_VAT",   $GOODS_VAT);
+    $strJsonString->setValue("SERVICE_AMT", $SERVICE_AMT);
+}
+
 $strJsonString->setValue("PAYMENT_HASH", $payHash);
 
 // 결과값을 담는 부분
diff --git a/shop/kakaopay/orderform.2.php b/shop/kakaopay/orderform.2.php
index 608316229..240ce5097 100644
--- a/shop/kakaopay/orderform.2.php
+++ b/shop/kakaopay/orderform.2.php
@@ -26,6 +26,11 @@ if($is_kakaopay_use) {
 <input type="hidden" name="NON_REP_TOKEN"  value="">
 <input type="hidden" name="EdiDate"        value="<?php echo($ediDate); ?>">
 <input type="hidden" name="EncryptData"    value="">
+<?php if($default['de_tax_flag_use']) { ?>
+<input type="hidden" name="SupplyAmt"     value="<?php echo ((int)$comm_tax_mny + (int)$comm_free_mny); ?>">
+<input type="hidden" name="GoodsVat"      value="<?php echo $comm_vat_mny; ?>">
+<input type="hidden" name="ServiceAmt"    value="0">
+<?php } ?>
 </div>
 
 <?php
diff --git a/shop/kakaopay/orderpartcancel.inc.php b/shop/kakaopay/orderpartcancel.inc.php
index 973200b74..29924e1a3 100644
--- a/shop/kakaopay/orderpartcancel.inc.php
+++ b/shop/kakaopay/orderpartcancel.inc.php
@@ -9,13 +9,18 @@ include_once(G5_SHOP_PATH.'/kakaopay/incKakaopayCommon.php');
 include_once(G5_SHOP_PATH.'/kakaopay/lgcns_CNSpay.php');
 
 $CancelNo                      = (int)$od['od_casseqno'] + 1;
+$vat_mny                       = round((int)$tax_mny / 1.1);
 
 $_REQUEST['TID']               = $od['od_tno'];
-$_REQUEST['Amt']               = (int)$tax_mny;
+$_REQUEST['Amt']               = (int)$tax_mny + (int)$free_mny;
 $_REQUEST['CancelMsg']         = $mod_memo;
 $_REQUEST['PartialCancelCode'] = 1;
 $_REQUEST['CheckRemainAmt']    = (int)$od['od_receipt_price'] - (int)$od['od_refund_price'];
 $_REQUEST['CancelNo']          = $CancelNo;
+$_REQUEST['SupplyAmt']         = ((int)$tax_mny + (int)$free_mny - $vat_mny);
+$_REQUEST['GoodsVat']          = $vat_mny;
+$_REQUEST['ServiceAmt']        = 0;
+
 
 // 로그 저장 위치 지정
 $connector = new CnsPayWebConnector($LogDir);
diff --git a/shop/orderform.sub.php b/shop/orderform.sub.php
index 09faa81a8..038ecece3 100644
--- a/shop/orderform.sub.php
+++ b/shop/orderform.sub.php
@@ -1295,6 +1295,10 @@ function forderform_check(f)
 
     // 카카오페이 지불
     if(settle_method == "KAKAOPAY") {
+        <?php if($default['de_tax_flag_use']) { ?>
+        f.SupplyAmt.value = parseInt(f.comm_tax_mny.value) + parseInt(f.comm_free_mny.value);
+        f.GoodsVat.value  = parseInt(f.comm_vat_mny.value);
+        <?php } ?>
         getTxnId(f);
         return false;
     }
diff --git a/shop/orderformupdate.php b/shop/orderformupdate.php
index 466b62364..1ef1d6230 100644
--- a/shop/orderformupdate.php
+++ b/shop/orderformupdate.php
@@ -470,7 +470,7 @@ if($escw_yn == 'Y')
 $od_tax_mny = round($i_price / 1.1);
 $od_vat_mny = $i_price - $od_tax_mny;
 $od_free_mny = 0;
-if($default['de_tax_flag_use'] && $od_pg != 'KAKAOPAY') {
+if($default['de_tax_flag_use']) {
     $od_tax_mny = (int)$_POST['comm_tax_mny'];
     $od_vat_mny = (int)$_POST['comm_vat_mny'];
     $od_free_mny = (int)$_POST['comm_free_mny'];
@@ -498,9 +498,6 @@ $od_memo          = clean_xss_tags($od_memo);
 $od_deposit_name  = clean_xss_tags($od_deposit_name);
 $od_tax_flag      = $default['de_tax_flag_use'];
 
-if($od_tax_flag && $od_pg == 'KAKAOPAY')
-    $od_tax_flag = 0;
-
 // 주문서에 입력
 $sql = " insert {$g5['g5_shop_order_table']}
             set od_id             = '$od_id',