Show empty tax rate column when tax is deleted instead of default

src/libs/TransactionUtils/index.ts

@@ -2167,11 +2167,14 @@ function getWorkspaceTaxesSettingsName(policy: OnyxEntry<Policy>, taxCode: strin
  * Gets the name corresponding to the taxCode that is displayed to the user
  */
 function getTaxName(policy: OnyxEntry<Policy>, transaction: OnyxEntry<Transaction>, shouldFallbackToValue = false) {
-    const defaultTaxCode = getDefaultTaxCode(policy, transaction);
+    // Don't fall back to the default tax code when taxCode is empty/undefined.
+    // Expense creation explicitly sets taxCode to the default (MoneyRequest.ts),
+    // so a missing taxCode means tax was deleted or never existed — not "use default".
+    if (!transaction?.taxCode) {
+        return undefined;
+    }
 
-    // transaction?.taxCode may be an empty string
-    // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-    const taxRate = Object.values(transformedTaxRates(policy, transaction)).find((rate) => rate.code === (transaction?.taxCode || defaultTaxCode));
+    const taxRate = Object.values(transformedTaxRates(policy, transaction)).find((rate) => rate.code === transaction.taxCode);
 
     if (shouldFallbackToValue && transaction?.taxValue !== undefined && taxRate?.value !== transaction?.taxValue) {
         return transaction?.taxValue;

src/libs/actions/IOU/UpdateMoneyRequest.ts

@@ -1235,7 +1235,7 @@ function getUpdateMoneyRequestParams(params: GetUpdateMoneyRequestParamsType): U
         apiParams.attendees = JSON.stringify(apiParams?.attendees);
     }
 
-    // Clear out the error fields and loading states on success
+    // Clear out the error fields and loading states on success.
     successData.push({
         onyxMethod: Onyx.METHOD.MERGE,
         key: `${ONYXKEYS.COLLECTION.TRANSACTION}${transactionID}`,

tests/unit/TransactionUtilsTest.ts

@@ -1881,15 +1881,26 @@ describe('TransactionUtils', () => {
             expect(result).toBe('Tax Rate 1 (5%)');
         });
 
-        it('should return default tax name when transaction has empty taxCode', () => {
+        it('should return empty string when transaction has empty taxCode (tax was deleted)', () => {
             const transaction = generateTransaction({
                 taxCode: '',
                 taxValue: undefined,
             });
 
             const result = TransactionUtils.getTaxRateTitle(policy, transaction, false, undefined);
 
-            expect(result).toBe('Tax exempt (0%) • Default');
+            expect(result).toBe('');
+        });
+
+        it('should return empty string when transaction has no taxCode (tax deleted or never set)', () => {
+            const transaction = generateTransaction({
+                taxCode: undefined,
+                taxValue: undefined,
+            });
+
+            const result = TransactionUtils.getTaxRateTitle(policy, transaction, false, undefined);
+
+            expect(result).toBe('');
         });
 
         it('should return empty string when policy is undefined', () => {