diff --git a/.changeset/orange-bikes-sparkle.md b/.changeset/orange-bikes-sparkle.md
new file mode 100644
index 0000000000..8e20d236ee
--- /dev/null
+++ b/.changeset/orange-bikes-sparkle.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/medusa": patch
+---
+
+fix(medusa): Upserting tax rates
diff --git a/integration-tests/api/__tests__/taxes/__snapshots__/admin-tax-rates.js.snap b/integration-tests/api/__tests__/taxes/__snapshots__/admin-tax-rates.js.snap
index 196fc06eed..c877e3534b 100644
--- a/integration-tests/api/__tests__/taxes/__snapshots__/admin-tax-rates.js.snap
+++ b/integration-tests/api/__tests__/taxes/__snapshots__/admin-tax-rates.js.snap
@@ -1,17 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`/admin/tax-rates creates a tax rate 1`] = `
-Object {
-  "code": "tricks",
-  "created_at": Any<String>,
-  "id": StringMatching /\\^txr_\\*/,
-  "name": "special",
-  "rate": null,
-  "region_id": "test-region",
-  "updated_at": Any<String>,
-}
-`;
-
 exports[`/admin/tax-rates deletes a tax rate 1`] = `
 Object {
   "deleted": true,
@@ -38,15 +26,3 @@ Object {
   "region_id": Any<String>,
 }
 `;
-
-exports[`/admin/tax-rates updates a tax rate 1`] = `
-Object {
-  "code": "something new",
-  "created_at": Any<String>,
-  "id": StringMatching /\\^txr_\\*/,
-  "name": "special",
-  "rate": 10,
-  "region_id": "test-region",
-  "updated_at": Any<String>,
-}
-`;
diff --git a/integration-tests/api/__tests__/taxes/admin-tax-rates.js b/integration-tests/api/__tests__/taxes/admin-tax-rates.js
index 49f98e82c7..618ddbb934 100644
--- a/integration-tests/api/__tests__/taxes/admin-tax-rates.js
+++ b/integration-tests/api/__tests__/taxes/admin-tax-rates.js
@@ -397,11 +397,84 @@ describe("/admin/tax-rates", () => {
     )
 
     expect(response.status).toEqual(200)
-    expect(response.data.tax_rate).toMatchSnapshot({
-      id: expect.stringMatching(/^txr_*/),
-      created_at: expect.any(String),
-      updated_at: expect.any(String),
+    expect(response.data.tax_rate).toEqual(
+      expect.objectContaining({
+        id: expect.stringMatching(/^txr_*/),
+        name: "special",
+        code: "tricks",
+        rate: null,
+      })
+    )
+  })
+
+  test("creates a tax rate with a rate", async () => {
+    await adminSeeder(dbConnection)
+
+    const api = useApi()
+    await simpleRegionFactory(dbConnection, {
+      id: "test-region",
     })
+
+    const response = await api.post(
+      `/admin/tax-rates`,
+      {
+        name: "special",
+        code: "tricks",
+        region_id: "test-region",
+        rate: 2,
+      },
+      {
+        headers: {
+          authorization: "Bearer test_token",
+        },
+      }
+    )
+
+    expect(response.status).toEqual(200)
+    expect(response.data.tax_rate).toEqual(
+      expect.objectContaining({
+        id: expect.stringMatching(/^txr_*/),
+        name: "special",
+        code: "tricks",
+        region_id: "test-region",
+        rate: 2,
+      })
+    )
+  })
+
+  test("creates a tax rate with a null rate", async () => {
+    await adminSeeder(dbConnection)
+
+    const api = useApi()
+    await simpleRegionFactory(dbConnection, {
+      id: "test-region",
+    })
+
+    const response = await api.post(
+      `/admin/tax-rates`,
+      {
+        name: "special",
+        code: "tricks",
+        region_id: "test-region",
+        rate: null,
+      },
+      {
+        headers: {
+          authorization: "Bearer test_token",
+        },
+      }
+    )
+
+    expect(response.status).toEqual(200)
+    expect(response.data.tax_rate).toEqual(
+      expect.objectContaining({
+        id: expect.stringMatching(/^txr_*/),
+        name: "special",
+        code: "tricks",
+        region_id: "test-region",
+        rate: null,
+      })
+    )
   })
 
   test("creates a tax rate and assigns products", async () => {
@@ -453,6 +526,7 @@ describe("/admin/tax-rates", () => {
       {
         name: "special",
         code: "something new",
+        rate: 5,
       },
       {
         headers: {
@@ -462,13 +536,48 @@ describe("/admin/tax-rates", () => {
     )
 
     expect(response.status).toEqual(200)
-    expect(response.data.tax_rate).toMatchSnapshot({
-      id: expect.stringMatching(/^txr_*/),
-      code: "special",
-      code: "something new",
-      created_at: expect.any(String),
-      updated_at: expect.any(String),
+    expect(response.data.tax_rate).toEqual(
+      expect.objectContaining({
+        id: expect.stringMatching(/^txr_*/),
+        name: "special",
+        code: "something new",
+        rate: 5,
+      })
+    )
+  })
+
+  test("updates a tax rate with null rate", async () => {
+    await adminSeeder(dbConnection)
+
+    await simpleRegionFactory(dbConnection, { id: "test-region" })
+
+    const rate = await simpleTaxRateFactory(dbConnection, {
+      name: "test",
+      code: "something",
+      rate: 10,
+      region_id: "test-region",
     })
+
+    const api = useApi()
+    const response = await api.post(
+      `/admin/tax-rates/${rate.id}`,
+      {
+        rate: null,
+      },
+      {
+        headers: {
+          authorization: "Bearer test_token",
+        },
+      }
+    )
+
+    expect(response.status).toEqual(200)
+    expect(response.data.tax_rate).toEqual(
+      expect.objectContaining({
+        id: expect.stringMatching(/^txr_*/),
+        rate: null,
+      })
+    )
   })
 
   test("deletes a tax rate", async () => {
diff --git a/packages/medusa/src/api/routes/admin/tax-rates/create-tax-rate.ts b/packages/medusa/src/api/routes/admin/tax-rates/create-tax-rate.ts
index 70e7ea34f9..9a24565bc3 100644
--- a/packages/medusa/src/api/routes/admin/tax-rates/create-tax-rate.ts
+++ b/packages/medusa/src/api/routes/admin/tax-rates/create-tax-rate.ts
@@ -1,12 +1,11 @@
-import { IsArray, IsOptional, IsString } from "class-validator"
+import { IsArray, IsNumber, IsOptional, IsString } from "class-validator"
 import { getRetrieveConfig, pickByConfig } from "./utils/get-query-config"
 
-import { EntityManager } from "typeorm"
-import { IsType } from "../../../../utils/validators/is-type"
+import { omit } from "lodash"
 import { isDefined, MedusaError } from "medusa-core-utils"
+import { EntityManager } from "typeorm"
 import { TaxRate } from "../../../.."
 import { TaxRateService } from "../../../../services"
-import { omit } from "lodash"
 import { validator } from "../../../../utils/validator"
 
 /**
@@ -187,7 +186,7 @@ export class AdminPostTaxRatesReq {
   region_id: string
 
   @IsOptional()
-  @IsType([Number, null])
+  @IsNumber()
   rate?: number | null
 
   @IsOptional()
diff --git a/packages/medusa/src/api/routes/admin/tax-rates/update-tax-rate.ts b/packages/medusa/src/api/routes/admin/tax-rates/update-tax-rate.ts
index 9b01a42856..0966b8c10c 100644
--- a/packages/medusa/src/api/routes/admin/tax-rates/update-tax-rate.ts
+++ b/packages/medusa/src/api/routes/admin/tax-rates/update-tax-rate.ts
@@ -1,13 +1,12 @@
-import { IsArray, IsOptional, IsString } from "class-validator"
+import { IsArray, IsNumber, IsOptional, IsString } from "class-validator"
 import { getRetrieveConfig, pickByConfig } from "./utils/get-query-config"
 
+import { omit } from "lodash"
+import { isDefined } from "medusa-core-utils"
 import { EntityManager } from "typeorm"
-import { IsType } from "../../../../utils/validators/is-type"
 import { TaxRate } from "../../../.."
 import { TaxRateService } from "../../../../services"
-import { omit } from "lodash"
 import { validator } from "../../../../utils/validator"
-import { isDefined } from "medusa-core-utils"
 
 /**
  * @oas [post] /admin/tax-rates/{id}
@@ -183,7 +182,7 @@ export class AdminPostTaxRatesTaxRateReq {
   region_id?: string
 
   @IsOptional()
-  @IsType([Number, null])
+  @IsNumber()
   rate?: number | null
 
   @IsOptional()