[CP Stg] Fix tax amount manual adjustment

src/components/MoneyRequestConfirmationList.tsx

@@ -35,7 +35,7 @@ import Log from '@libs/Log';
 import {validateAmount} from '@libs/MoneyRequestUtils';
 import Navigation from '@libs/Navigation/Navigation';
 import {getIOUConfirmationOptionsFromPayeePersonalDetail, hasEnabledOptions} from '@libs/OptionsListUtils';
-import {getDistanceRateCustomUnitRate, getTagLists, isTaxTrackingEnabled} from '@libs/PolicyUtils';
+import {getTagLists, isTaxTrackingEnabled} from '@libs/PolicyUtils';
 import {isSelectedManagerMcTest} from '@libs/ReportUtils';
 import type {OptionData} from '@libs/ReportUtils';
 import {
@@ -475,35 +475,16 @@ function MoneyRequestConfirmationList({
     }, [shouldCalculateDistanceAmount, isReadOnly, distanceRequestAmount, transactionID, currency, isTypeSplit, isPolicyExpenseChat, selectedParticipantsProp, transaction]);
 
     // Calculate and set tax amount in transaction draft
+    const taxableAmount = isDistanceRequest ? DistanceRequestUtils.getTaxableAmount(policy, customUnitRateID, distance) : (transaction?.amount ?? 0);
+    const taxPercentage = getTaxValue(policy, transaction, transaction?.taxCode ?? defaultTaxCode) ?? '';
+    const taxAmount = calculateTaxAmount(taxPercentage, taxableAmount, transaction?.currency ?? CONST.CURRENCY.USD);
+    const taxAmountInSmallestCurrencyUnits = convertToBackendAmount(Number.parseFloat(taxAmount.toString()));
     useEffect(() => {
-        if (!shouldShowTax || !transaction) {
+        if (!transactionID) {
             return;
         }
-
-        let taxableAmount: number | undefined;
-        let taxCode: string | undefined;
-        if (isDistanceRequest) {
-            if (customUnitRateID) {
-                const customUnitRate = getDistanceRateCustomUnitRate(policy, customUnitRateID);
-                taxCode = customUnitRate?.attributes?.taxRateExternalID;
-                taxableAmount = DistanceRequestUtils.getTaxableAmount(policy, customUnitRateID, distance);
-            }
-        } else {
-            taxableAmount = transaction.amount ?? 0;
-            taxCode = transaction.taxCode ?? getDefaultTaxCode(policy, transaction) ?? '';
-        }
-
-        if (taxCode && taxableAmount) {
-            const taxPercentage = getTaxValue(policy, transaction, taxCode) ?? '';
-            const taxAmount = calculateTaxAmount(taxPercentage, taxableAmount, transaction.currency);
-            const taxAmountInSmallestCurrencyUnits = convertToBackendAmount(Number.parseFloat(taxAmount.toString()));
-
-            // Only update if the calculated tax amount is different from the current one
-            if (transaction.taxAmount !== taxAmountInSmallestCurrencyUnits) {
-                setMoneyRequestTaxAmount(transaction.transactionID, taxAmountInSmallestCurrencyUnits);
-            }
-        }
-    }, [policy, shouldShowTax, transaction, isDistanceRequest, customUnitRateID, distance]);
+        setMoneyRequestTaxAmount(transactionID, taxAmountInSmallestCurrencyUnits);
+    }, [transactionID, taxAmountInSmallestCurrencyUnits]);
 
     // If completing a split expense fails, set didConfirm to false to allow the user to edit the fields again
     if (isEditingSplitBill && didConfirm) {
@@ -964,6 +945,7 @@ function MoneyRequestConfirmationList({
             routeError,
             isDelegateAccessRestricted,
             showDelegateNoAccessModal,
+            setDidConfirmSplit,
         ],
     );