diff --git a/llm_normalizer/backend/dist/services/addressQueryService.js b/llm_normalizer/backend/dist/services/addressQueryService.js
index db1b341..7482df6 100644
--- a/llm_normalizer/backend/dist/services/addressQueryService.js
+++ b/llm_normalizer/backend/dist/services/addressQueryService.js
@@ -3023,8 +3023,14 @@ class AddressQueryService {
             (filters.warnings.includes("period_from_from_followup_context") ||
                 filters.warnings.includes("period_to_from_followup_context")) &&
             isFullCalendarMonthWindow(filters.extracted_filters.period_from, filters.extracted_filters.period_to);
+        const vatTaxPeriodFromPurchaseBridgeMonth = intent.intent === "vat_liability_confirmed_for_tax_period" &&
+            (filters.warnings.includes("period_from_purchase_date_bridge_followup_context") ||
+                filters.warnings.includes("period_to_purchase_date_bridge_followup_context")) &&
+            isFullCalendarMonthWindow(filters.extracted_filters.period_from, filters.extracted_filters.period_to);
         if (intent.intent === "vat_liability_confirmed_for_tax_period" &&
-            (filters.warnings.includes("period_derived_from_month_phrase") || vatTaxPeriodFromCarriedMonth)) {
+            (filters.warnings.includes("period_derived_from_month_phrase") ||
+                vatTaxPeriodFromCarriedMonth ||
+                vatTaxPeriodFromPurchaseBridgeMonth)) {
             const taxQuarterWindow = deriveTaxQuarterWindowForDate(filters.extracted_filters.period_to);
             if (taxQuarterWindow) {
                 filters.extracted_filters = {
diff --git a/llm_normalizer/backend/src/services/addressQueryService.ts b/llm_normalizer/backend/src/services/addressQueryService.ts
index 43099eb..450db90 100644
--- a/llm_normalizer/backend/src/services/addressQueryService.ts
+++ b/llm_normalizer/backend/src/services/addressQueryService.ts
@@ -3738,9 +3738,16 @@ export class AddressQueryService {
       (filters.warnings.includes("period_from_from_followup_context") ||
         filters.warnings.includes("period_to_from_followup_context")) &&
       isFullCalendarMonthWindow(filters.extracted_filters.period_from, filters.extracted_filters.period_to);
+    const vatTaxPeriodFromPurchaseBridgeMonth =
+      intent.intent === "vat_liability_confirmed_for_tax_period" &&
+      (filters.warnings.includes("period_from_purchase_date_bridge_followup_context") ||
+        filters.warnings.includes("period_to_purchase_date_bridge_followup_context")) &&
+      isFullCalendarMonthWindow(filters.extracted_filters.period_from, filters.extracted_filters.period_to);
     if (
       intent.intent === "vat_liability_confirmed_for_tax_period" &&
-      (filters.warnings.includes("period_derived_from_month_phrase") || vatTaxPeriodFromCarriedMonth)
+      (filters.warnings.includes("period_derived_from_month_phrase") ||
+        vatTaxPeriodFromCarriedMonth ||
+        vatTaxPeriodFromPurchaseBridgeMonth)
     ) {
       const taxQuarterWindow = deriveTaxQuarterWindowForDate(filters.extracted_filters.period_to);
       if (taxQuarterWindow) {
diff --git a/llm_normalizer/backend/tests/addressQueryRuntimeM23.test.ts b/llm_normalizer/backend/tests/addressQueryRuntimeM23.test.ts
index e5f0de0..cd19456 100644
--- a/llm_normalizer/backend/tests/addressQueryRuntimeM23.test.ts
+++ b/llm_normalizer/backend/tests/addressQueryRuntimeM23.test.ts
@@ -4129,6 +4129,40 @@ describe("address query limited taxonomy and stage diagnostics", { timeout: 9000
     expect(String(result?.reply_text ?? "")).toContain("01.04.2017..30.06.2017");
   }, 35000);
 
+  it("normalizes purchase-date VAT bridge month into the selected date tax quarter", async () => {
+    const service = new AddressQueryService();
+    const result = await service.tryHandle("ндс можешь прикинуть на дату покупки рабочей станции?", {
+      followupContext: {
+        previous_intent: "inventory_purchase_provenance_for_item",
+        target_intent: "vat_liability_confirmed_for_tax_period",
+        previous_filters: {
+          item: "Рабочая станция универсального специалиста",
+          organization: 'ООО "Альтернатива Плюс"',
+          period_from: "2015-02-01",
+          period_to: "2015-02-28",
+          as_of_date: "2015-02-28",
+          purchase_date_bridge_selected: "2015-02-05",
+          purchase_date_bridge_first: "2015-02-05",
+          purchase_date_bridge_last: "2015-07-22",
+          purchase_date_bridge_basis: "first_confirmed_purchase_default",
+          purchase_date_bridge_has_multiple: true
+        },
+        previous_anchor_type: "item",
+        previous_anchor_value: "Рабочая станция универсального специалиста"
+      }
+    });
+
+    expect(result?.handled).toBe(true);
+    expect(result?.debug.detected_intent).toBe("vat_liability_confirmed_for_tax_period");
+    expect(result?.debug.extracted_filters.period_from).toBe("2015-01-01");
+    expect(result?.debug.extracted_filters.period_to).toBe("2015-03-31");
+    expect(result?.debug.extracted_filters.purchase_date_bridge_selected).toBe("2015-02-05");
+    expect(result?.debug.reasons).toContain("period_from_purchase_date_bridge_followup_context");
+    expect(result?.debug.reasons).toContain("period_derived_from_tax_quarter_for_confirmed_vat_liability");
+    expect(String(result?.reply_text ?? "")).toContain("05.02.2015");
+    expect(String(result?.reply_text ?? "")).toContain("01.01.2015..31.03.2015");
+  }, 35000);
+
   it("routes customer lifecycle question into dedicated aggregate recipe", async () => {
     const service = new AddressQueryService();
     const result = await service.tryHandle("Какие заказчики работали с нами в 2020 году?");