diff --git a/apps/as/src/pages/instl-sncn/lib/button-config.ts b/apps/as/src/pages/instl-sncn/lib/button-config.ts
index 826fa498a..3d014eeb6 100644
--- a/apps/as/src/pages/instl-sncn/lib/button-config.ts
+++ b/apps/as/src/pages/instl-sncn/lib/button-config.ts
@@ -44,7 +44,7 @@ const ROLE_STATUS_BUTTON_ACTIONS: Record<string, Record<string, InstlSncnViewBut
   },
 };
 
-const ROLE_USER01_ATRZ_STATUS_CODES = ["ER", "TE"] as const;
+const ROLE_USER01_ATRZ_STATUS_CODES = ["ER", "SL", "TE"] as const;
 
 const ROLE_USER01_ATRZ_STATUS_ACTIONS: Record<
   string,
@@ -53,6 +53,7 @@ const ROLE_USER01_ATRZ_STATUS_ACTIONS: Record<
   ER: {
     ATRZ01: [INSTL_SNCN_VIEW_BUTTON_ACTION.dsgntRvwr],
   },
+  SL: {},
   TE: {
     ATRZ02: [
       INSTL_SNCN_VIEW_BUTTON_ACTION.rvwStrg,
@@ -77,6 +78,7 @@ const ROLE_USER01_FORK_JOIN_ATRZ_STATUS_ACTIONS: Record<
   ER: {
     ATRZ01: [INSTL_SNCN_VIEW_BUTTON_ACTION.dsgntRvwr],
   },
+  SL: {},
   TE: {
     ATRZ02: [
       INSTL_SNCN_VIEW_BUTTON_ACTION.rvwStrg,
@@ -95,6 +97,8 @@ function resolveButtonConfigs(actions: InstlSncnViewButtonAction[]): InstlSncnVi
 }
 
 const PENDING_APPROVAL_ACTIONS = new Set<InstlSncnViewButtonAction>([
+  INSTL_SNCN_VIEW_BUTTON_ACTION.rvwStrg,
+  INSTL_SNCN_VIEW_BUTTON_ACTION.dmndSplmnt,
   INSTL_SNCN_VIEW_BUTTON_ACTION.rvwCmptn,
   INSTL_SNCN_VIEW_BUTTON_ACTION.atrzAprv,
   INSTL_SNCN_VIEW_BUTTON_ACTION.atrzRply,
diff --git a/apps/as/src/pages/instl-sncn/lib/review-step-utils.ts b/apps/as/src/pages/instl-sncn/lib/review-step-utils.ts
index 7b50a9817..266f48d22 100644
--- a/apps/as/src/pages/instl-sncn/lib/review-step-utils.ts
+++ b/apps/as/src/pages/instl-sncn/lib/review-step-utils.ts
@@ -8,6 +8,7 @@ import {
 } from "../model/view-types";
 
 export function getProgressStepCount(prgrsSttsComCd?: string): number {
+  if (prgrsSttsComCd === "SL") return 3;
   const idx = INSTL_PROGRESS_ORDER.indexOf(prgrsSttsComCd as (typeof INSTL_PROGRESS_ORDER)[number]);
   if (idx <= INSTL_PROGRESS_ORDER.indexOf("SV")) return 1;
   if (idx <= INSTL_PROGRESS_ORDER.indexOf("LE")) return 2;
@@ -54,7 +55,7 @@ export function getEditableReviewStep(
     return "ENV";
   }
 
-  if (dtlInstCd === "ROLE_USER01" && prgrsSttsComCd === "TE") {
+  if (dtlInstCd === "ROLE_USER01" && (prgrsSttsComCd === "TE" || prgrsSttsComCd === "SL")) {
     return "KECO";
   }
 
diff --git a/apps/as/src/pages/instl-sncn/lib/save-payload-utils.ts b/apps/as/src/pages/instl-sncn/lib/save-payload-utils.ts
index 93627f453..6d2875240 100644
--- a/apps/as/src/pages/instl-sncn/lib/save-payload-utils.ts
+++ b/apps/as/src/pages/instl-sncn/lib/save-payload-utils.ts
@@ -79,6 +79,7 @@ export function buildSupplementReqPayload(
   data: InstlSncnMngDetResponse,
   payload: SplmntDmndDialogConfirmPayload,
   checklistFormState: ChecklistFormState,
+  branchSeCd?: string,
 ): InstlSncnApplySaveRequestDto {
   const existingItems: InstlSncnSplmntDmndSaveDto[] = (data.splmntDmndList ?? []).map((item) =>
     toSplmntDmndSaveItem(item),
@@ -97,6 +98,7 @@ export function buildSupplementReqPayload(
   return instlSncnApplySaveSchema.parse({
     ...buildSavePayload(data, checklistFormState, "LOCAL", "SL"),
     splmntDmndList: [...existingItems, ...newItems],
+    branchSeCd,
   });
 }
 
diff --git a/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx
index cf3c94584..df792f620 100644
--- a/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx
@@ -91,12 +91,13 @@ function FloatingActionButtons({
   const normalizedTaskSeComCd = normalizeTaskSeComCdForElapr(data.detDto.taskSeComCd);
 
   const needsAtrzResolve = needsRoleUser01AtrzResolve(dtlInstCd, prgrsSttsComCd);
-  const needsTeApprovalCheck = needsAtrzResolve && prgrsSttsComCd === "TE";
+  const needsApprovalCheck =
+    needsAtrzResolve && (prgrsSttsComCd === "TE" || (isForkJoin && prgrsSttsComCd === "SL"));
   const { data: elaprDocPrgrsList = [], isLoading: isElaprDocPrgrsLoading } =
-    useElaprDocPrgrsByDocNo(needsTeApprovalCheck ? docNo : null);
+    useElaprDocPrgrsByDocNo(needsApprovalCheck ? docNo : null);
 
   const { data: elaprBranchList = [], isLoading: isElaprBranchLoading } = useElaprBranchesByDocNo(
-    isForkJoin && needsTeApprovalCheck ? docNo : null,
+    isForkJoin && (needsApprovalCheck || prgrsSttsComCd === "SL") ? docNo : null,
   );
 
   const hasPendingApprovalRequest = hasCurrentUserPendingApprovalRequest(
@@ -132,12 +133,61 @@ function FloatingActionButtons({
     return atrzSeComCdList;
   }, [atrzSeComCdList, currentUserPrgrsRow?.atrzSeComCd, isForkJoin, userPendingAtrzSeComCd]);
 
+  const supplementDmndBranch = useMemo(() => {
+    if (!isForkJoin) return undefined;
+
+    // 1순위: 전자결재 브랜치(tb_as_elapr_branch) 테이블에서 상태가 SUPPLEMENT인 브랜치 확인
+    const splmntBranch = elaprBranchList.find((b) => b.branchSttsCd === "SUPPLEMENT");
+    if (splmntBranch?.branchSeCd && ["SP", "SF"].includes(splmntBranch.branchSeCd)) {
+      return splmntBranch.branchSeCd as "SP" | "SF";
+    }
+
+    // 2순위: 미완료 보완요청 항목의 등록자 UUID 매칭
+    const uncompletedItems = data?.splmntDmndList?.filter((item) => item.cmptnYn !== "Y") ?? [];
+    if (uncompletedItems.length > 0) {
+      for (const splmnt of uncompletedItems) {
+        const matchedPrgrs = elaprDocPrgrsList.find(
+          (p) => p.aprvrUuid?.toLowerCase() === splmnt.rgtr?.toLowerCase(),
+        );
+        if (matchedPrgrs?.branchSeCd && ["SP", "SF"].includes(matchedPrgrs.branchSeCd)) {
+          return matchedPrgrs.branchSeCd as "SP" | "SF";
+        }
+      }
+    }
+    return undefined;
+  }, [data?.splmntDmndList, elaprBranchList, elaprDocPrgrsList, isForkJoin]);
+
   const userBranchSttsCd = useMemo<string | undefined>(() => {
     if (!isForkJoin || !userBranchSeCd) return undefined;
 
     const matchedBranch = userBranchId
       ? elaprBranchList.find((b) => b.branchId === userBranchId)
       : elaprBranchList.findLast((b) => b.branchSeCd === userBranchSeCd);
+
+    // 1. 이미 백엔드 브랜치 상태가 SUPPLEMENT이면 즉시 SUPPLEMENT
+    if (matchedBranch?.branchSttsCd === "SUPPLEMENT") {
+      return "SUPPLEMENT";
+    }
+
+    // 2. 문서 상태가 SL일 때: 보완요청 발생 부서(supplementDmndBranch 또는 본인 등록 건) 우선 판정
+    if (prgrsSttsComCd === "SL") {
+      const hasMyUncompletedSplmnt = data?.splmntDmndList?.some(
+        (item) => item.cmptnYn !== "Y" && item.rgtr?.toLowerCase() === userInfo?.userUnqId?.toLowerCase(),
+      );
+      if (hasMyUncompletedSplmnt || (supplementDmndBranch && userBranchSeCd === supplementDmndBranch)) {
+        return "SUPPLEMENT";
+      }
+
+      // 보완요청을 하지 않은 타 브랜치(시설부 등)는 결재 진행 중 상태 유지
+      const branchRows = elaprDocPrgrsList.filter((row) => row.branchSeCd === userBranchSeCd);
+      const hasUnfinished = branchRows.some(
+        (row) =>
+          row.atrzPrgrsSttsComCd !== "ATRZ_PRGRS_003" && row.atrzPrgrsSttsComCd !== "ATRZ_PRGRS_999",
+      );
+      return hasUnfinished ? "IN_PROGRESS" : "COMPLETED";
+    }
+
+    // 3. SL이 아닌 일반 상태(TE 등)에서는 matchedBranch 상태 적용
     if (matchedBranch?.branchSttsCd) {
       return matchedBranch.branchSttsCd;
     }
@@ -150,14 +200,24 @@ function FloatingActionButtons({
     }
 
     return undefined;
-  }, [elaprBranchList, isForkJoin, prgrsSttsComCd, userBranchId, userBranchSeCd]);
+  }, [
+    data?.splmntDmndList,
+    elaprBranchList,
+    elaprDocPrgrsList,
+    isForkJoin,
+    prgrsSttsComCd,
+    supplementDmndBranch,
+    userBranchId,
+    userBranchSeCd,
+    userInfo?.userUnqId,
+  ]);
 
   const actionButtons = useMemo(() => {
     if (needsAtrzResolve && isRvwLoginUserLoading) return [];
-    if (needsTeApprovalCheck && isElaprDocPrgrsLoading) return [];
+    if (needsApprovalCheck && isElaprDocPrgrsLoading) return [];
     if (isForkJoin && isElaprBranchLoading) return [];
     return getButtonConfigs(dtlInstCd, prgrsSttsComCd, effectiveAtrzSeComCdList, {
-      hasPendingApprovalRequest: needsTeApprovalCheck ? hasPendingApprovalRequest : undefined,
+      hasPendingApprovalRequest: needsApprovalCheck ? hasPendingApprovalRequest : undefined,
       isForkJoin,
       branchSeCd: userBranchSeCd,
       branchSttsCd: userBranchSttsCd,
@@ -170,8 +230,8 @@ function FloatingActionButtons({
     isElaprDocPrgrsLoading,
     isForkJoin,
     isRvwLoginUserLoading,
+    needsApprovalCheck,
     needsAtrzResolve,
-    needsTeApprovalCheck,
     prgrsSttsComCd,
     userBranchSeCd,
     userBranchSttsCd,
@@ -387,11 +447,12 @@ function FloatingActionButtons({
   }
 
   async function handleRvwStrgClick() {
+    const targetPrgrsStts = prgrsSttsComCd === "SL" ? "SL" : "TE";
     const payload = buildTechReviewReplyPayload(
       data,
       checklistFormState,
       "KECO",
-      "TE",
+      targetPrgrsStts,
       "SV",
       getReviewOpinionFormData(),
       opnrNm,
@@ -406,13 +467,13 @@ function FloatingActionButtons({
   }
 
   async function handleRvwCmptnClick() {
-
+    const targetPrgrsStts = prgrsSttsComCd === "SL" ? "SL" : "TE";
     const payload = {
       ...buildTechReviewReplyPayload(
         data,
         checklistFormState,
         "KECO",
-        "TE",
+        targetPrgrsStts,
         "SV",
         getReviewOpinionFormData(),
         opnrNm,
@@ -434,7 +495,13 @@ function FloatingActionButtons({
 
   async function handleDmndSplmntConfirm(payload: SplmntDmndDialogConfirmPayload) {
     setActiveDialog(null);
-    const requestPayload = buildSupplementReqPayload(data, payload, checklistFormState);
+    const branchSeCd = userBranchSeCd ?? userPendingBranchSeCd;
+    const requestPayload = buildSupplementReqPayload(
+      data,
+      payload,
+      checklistFormState,
+      branchSeCd,
+    );
     await executeAction({
       action: INSTL_SNCN_VIEW_BUTTON_ACTION.dmndSplmnt,
       request: requestPayload,
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts b/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts
index d6b72beb4..b5a4aac66 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts
@@ -34,7 +34,7 @@ const ROLE_STATUS_BUTTON_ACTIONS: Record<string, Record<string, SewerBscPlanView
   },
 };
 
-const ROLE_USER01_ATRZ_STATUS_CODES = ["ER", "TE"] as const;
+const ROLE_USER01_ATRZ_STATUS_CODES = ["ER", "SL", "TE"] as const;
 
 const ROLE_USER01_ATRZ_STATUS_ACTIONS: Record<
   string,
@@ -43,6 +43,7 @@ const ROLE_USER01_ATRZ_STATUS_ACTIONS: Record<
   ER: {
     ATRZ01: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dsgntRvwr],
   },
+  SL: {},
   TE: {
     ATRZ02: [
       SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwStrg,
@@ -67,6 +68,7 @@ const ROLE_USER01_FORK_JOIN_ATRZ_STATUS_ACTIONS: Record<
   ER: {
     ATRZ01: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dsgntRvwr],
   },
+  SL: {},
   TE: {
     ATRZ02: [
       SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwStrg,
@@ -87,6 +89,8 @@ function resolveButtonConfigs(
 }
 
 const PENDING_APPROVAL_ACTIONS = new Set<SewerBscPlanViewButtonAction>([
+  SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwStrg,
+  SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dmndSplmnt,
   SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwCmptn,
   SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.atrzAprv,
   SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.atrzRply,
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
index df63265a4..5be72ee20 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
@@ -124,6 +124,7 @@ export function buildSupplementReqPayload(
   data: SewerBscPlanDetResponseDto,
   payload: SplmntDmndDialogConfirmPayload,
   checklistFormState: ChecklistFormState,
+  branchSeCd?: string,
 ): SewerBscPlanApplySaveRequestDto {
   const existingItems: SewerBscPlanSplmntDmndItem[] = (data.splmntDmndList ?? []).map((item) =>
     toSplmntDmndSaveItem(item),
@@ -140,6 +141,7 @@ export function buildSupplementReqPayload(
   return sewerBscPlanApplySaveSchema.parse({
     ...buildSavePayload(data, checklistFormState, "LOCAL", "SL"),
     splmntDmndList: [...existingItems, ...newItems],
+    branchSeCd,
   });
 }
 
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts
index 5fab31348..89744c5bc 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts
@@ -9,6 +9,7 @@ import {
 } from "../model/view-types";
 
 export function getProgressStepCount(prgrsSttsComCd?: string): number {
+  if (prgrsSttsComCd === "SL") return 3;
   const idx = PBADMS_PROGRESS_ORDER.indexOf(
     prgrsSttsComCd as (typeof PBADMS_PROGRESS_ORDER)[number],
   );
@@ -57,7 +58,7 @@ export function getEditableReviewStep(
     return "ENV";
   }
 
-  if (dtlInstCd === "ROLE_USER01" && prgrsSttsComCd === "TE") {
+  if (dtlInstCd === "ROLE_USER01" && (prgrsSttsComCd === "TE" || prgrsSttsComCd === "SL")) {
     return "KECO";
   }
 
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx
index 2feaec62f..469fbbf66 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx
@@ -94,11 +94,12 @@ function FloatingActionButtons({
   const isForkJoin = isForkJoinTask(data.detDto?.taskSeComCd);
 
   const needsAtrzResolve = needsRoleUser01AtrzResolve(dtlInstCd, prgrsSttsComCd);
-  const needsTeApprovalCheck = needsAtrzResolve && prgrsSttsComCd === "TE";
+  const needsApprovalCheck =
+    needsAtrzResolve && (prgrsSttsComCd === "TE" || (isForkJoin && prgrsSttsComCd === "SL"));
   const { data: elaprDocPrgrsList = [], isLoading: isElaprDocPrgrsLoading } =
-    useElaprDocPrgrsByDocNo(needsTeApprovalCheck ? docNo : null);
+    useElaprDocPrgrsByDocNo(needsApprovalCheck ? docNo : null);
   const { data: elaprBranchList = [], isLoading: isElaprBranchLoading } =
-    useElaprBranchesByDocNo(needsTeApprovalCheck && isForkJoin ? docNo : null);
+    useElaprBranchesByDocNo(isForkJoin && (needsApprovalCheck || prgrsSttsComCd === "SL") ? docNo : null);
 
   const hasPendingApprovalRequest = hasCurrentUserPendingApprovalRequest(
     elaprDocPrgrsList,
@@ -133,12 +134,61 @@ function FloatingActionButtons({
     return atrzSeComCdList;
   }, [atrzSeComCdList, currentUserPrgrsRow?.atrzSeComCd, isForkJoin, userPendingAtrzSeComCd]);
 
+  const supplementDmndBranch = useMemo(() => {
+    if (!isForkJoin) return undefined;
+
+    // 1순위: 전자결재 브랜치(tb_as_elapr_branch) 테이블에서 상태가 SUPPLEMENT인 브랜치 확인
+    const splmntBranch = elaprBranchList.find((b) => b.branchSttsCd === "SUPPLEMENT");
+    if (splmntBranch?.branchSeCd && ["SP", "SF"].includes(splmntBranch.branchSeCd)) {
+      return splmntBranch.branchSeCd as "SP" | "SF";
+    }
+
+    // 2순위: 미완료 보완요청 항목의 등록자 UUID 매칭
+    const uncompletedItems = data?.splmntDmndList?.filter((item) => item.cmptnYn !== "Y") ?? [];
+    if (uncompletedItems.length > 0) {
+      for (const splmnt of uncompletedItems) {
+        const matchedPrgrs = elaprDocPrgrsList.find(
+          (p) => p.aprvrUuid?.toLowerCase() === splmnt.rgtr?.toLowerCase(),
+        );
+        if (matchedPrgrs?.branchSeCd && ["SP", "SF"].includes(matchedPrgrs.branchSeCd)) {
+          return matchedPrgrs.branchSeCd as "SP" | "SF";
+        }
+      }
+    }
+    return undefined;
+  }, [data?.splmntDmndList, elaprBranchList, elaprDocPrgrsList, isForkJoin]);
+
   const userBranchSttsCd = useMemo<string | undefined>(() => {
     if (!isForkJoin || !userBranchSeCd) return undefined;
 
     const matchedBranch = userBranchId
       ? elaprBranchList.find((b) => b.branchId === userBranchId)
       : elaprBranchList.findLast((b) => b.branchSeCd === userBranchSeCd);
+
+    // 1. 이미 백엔드 브랜치 상태가 SUPPLEMENT이면 즉시 SUPPLEMENT
+    if (matchedBranch?.branchSttsCd === "SUPPLEMENT") {
+      return "SUPPLEMENT";
+    }
+
+    // 2. 문서 상태가 SL일 때: 보완요청 발생 부서(supplementDmndBranch 또는 본인 등록 건) 우선 판정
+    if (prgrsSttsComCd === "SL") {
+      const hasMyUncompletedSplmnt = data?.splmntDmndList?.some(
+        (item) => item.cmptnYn !== "Y" && item.rgtr?.toLowerCase() === userInfo?.userUnqId?.toLowerCase(),
+      );
+      if (hasMyUncompletedSplmnt || (supplementDmndBranch && userBranchSeCd === supplementDmndBranch)) {
+        return "SUPPLEMENT";
+      }
+
+      // 보완요청을 하지 않은 타 브랜치(시설부 등)는 결재 진행 중 상태 유지
+      const branchRows = elaprDocPrgrsList.filter((row) => row.branchSeCd === userBranchSeCd);
+      const hasUnfinished = branchRows.some(
+        (row) =>
+          row.atrzPrgrsSttsComCd !== "ATRZ_PRGRS_003" && row.atrzPrgrsSttsComCd !== "ATRZ_PRGRS_999",
+      );
+      return hasUnfinished ? "IN_PROGRESS" : "COMPLETED";
+    }
+
+    // 3. SL이 아닌 일반 상태(TE 등)에서는 matchedBranch 상태 적용
     if (matchedBranch?.branchSttsCd) {
       return matchedBranch.branchSttsCd;
     }
@@ -151,14 +201,24 @@ function FloatingActionButtons({
     }
 
     return undefined;
-  }, [elaprBranchList, isForkJoin, prgrsSttsComCd, userBranchId, userBranchSeCd]);
+  }, [
+    data?.splmntDmndList,
+    elaprBranchList,
+    elaprDocPrgrsList,
+    isForkJoin,
+    prgrsSttsComCd,
+    supplementDmndBranch,
+    userBranchId,
+    userBranchSeCd,
+    userInfo?.userUnqId,
+  ]);
 
   const actionButtons = useMemo(() => {
     if (needsAtrzResolve && isRvwLoginUserLoading) return [];
-    if (needsTeApprovalCheck && isElaprDocPrgrsLoading) return [];
+    if (needsApprovalCheck && isElaprDocPrgrsLoading) return [];
     if (isForkJoin && isElaprBranchLoading) return [];
     return getButtonConfigs(dtlInstCd, prgrsSttsComCd, effectiveAtrzSeComCdList, {
-      hasPendingApprovalRequest: needsTeApprovalCheck ? hasPendingApprovalRequest : undefined,
+      hasPendingApprovalRequest: needsApprovalCheck ? hasPendingApprovalRequest : undefined,
       isForkJoin,
       branchSeCd: userBranchSeCd,
       branchSttsCd: userBranchSttsCd,
@@ -171,8 +231,8 @@ function FloatingActionButtons({
     isElaprDocPrgrsLoading,
     isForkJoin,
     isRvwLoginUserLoading,
+    needsApprovalCheck,
     needsAtrzResolve,
-    needsTeApprovalCheck,
     prgrsSttsComCd,
     userBranchSeCd,
     userBranchSttsCd,
@@ -339,11 +399,12 @@ function FloatingActionButtons({
   }
 
   async function handleRvwStrgClick() {
+    const targetPrgrsStts = prgrsSttsComCd === "SL" ? "SL" : "TE";
     const payload = buildTechReviewReplyPayload(
       data,
       checklistFormState,
       "KECO",
-      "TE",
+      targetPrgrsStts,
       "SV",
       getReviewOpinionFormData(),
       opnrNm,
@@ -369,12 +430,13 @@ function FloatingActionButtons({
       return;
     }
 
+    const targetPrgrsStts = prgrsSttsComCd === "SL" ? "SL" : "TE";
     const payload = {
       ...buildTechReviewReplyPayload(
         data,
         checklistFormState,
         "KECO",
-        "TE",
+        targetPrgrsStts,
         "SV",
         getReviewOpinionFormData(),
         opnrNm,
@@ -396,7 +458,13 @@ function FloatingActionButtons({
 
   async function handleDmndSplmntConfirm(payload: SplmntDmndDialogConfirmPayload) {
     setActiveDialog(null);
-    const requestPayload = buildSupplementReqPayload(data, payload, checklistFormState);
+    const branchSeCd = userBranchSeCd ?? userPendingBranchSeCd;
+    const requestPayload = buildSupplementReqPayload(
+      data,
+      payload,
+      checklistFormState,
+      branchSeCd,
+    );
     await executeAction({
       action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dmndSplmnt,
       request: requestPayload,