Merge pull request Expensify#83643 from Expensify/claude-fixNegativeExpenseTaxAmount

Use Math.abs for taxable amount in negative expense tax calculation

Author: inimaga

src/components/MoneyRequestConfirmationList.tsx

@@ -547,7 +547,7 @@ 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 taxableAmount = isDistanceRequest ? DistanceRequestUtils.getTaxableAmount(policy, customUnitRateID, distance) : Math.abs(transaction?.amount ?? 0);
     // First we'll try to get the tax value from the chosen policy and if not found, we'll try to get it from the policy for moving expenses (only if the transaction is moving from track expense)
     const taxPercentage =
         getTaxValue(policy, transaction, transaction?.taxCode ?? defaultTaxCode) ??