diff --git a/.changeset/eight-baths-win.md b/.changeset/eight-baths-win.md
new file mode 100644
index 0000000000..9fe3d44628
--- /dev/null
+++ b/.changeset/eight-baths-win.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/dashboard": patch
+---
+
+fix(dashboard): form reset for across allocation
diff --git a/packages/admin/dashboard/src/routes/promotions/promotion-create/components/create-promotion-form/create-promotion-form.tsx b/packages/admin/dashboard/src/routes/promotions/promotion-create/components/create-promotion-form/create-promotion-form.tsx
index d823263943..eebf5f33bf 100644
--- a/packages/admin/dashboard/src/routes/promotions/promotion-create/components/create-promotion-form/create-promotion-form.tsx
+++ b/packages/admin/dashboard/src/routes/promotions/promotion-create/components/create-promotion-form/create-promotion-form.tsx
@@ -275,6 +275,12 @@ export const CreatePromotionForm = () => {
       }
     }
 
+    // if switching to `across` allocation, reset call above will set the max quantity to 1 which is forbidden for this allocation type
+    // but since there wasn't change in the `application_method.allocation` field, useEffect below responsible for resetting will not be triggered
+    if (currentTemplate.defaults?.application_method?.allocation === "across") {
+      setValue("application_method.max_quantity", null)
+    }
+
     return currentTemplate
   }, [watchTemplateId, setValue, reset])