Fix Search filter tax rate page

Author: parasharrajat

src/pages/Search/SearchAdvancedFiltersPage/SearchFiltersTaxRatePage.tsx

@@ -30,7 +30,7 @@ function SearchFiltersTaxRatePage() {
     });
     const policyIDs = searchAdvancedFiltersForm?.policyID ?? [];
     const [policies] = useOnyx(`${ONYXKEYS.COLLECTION.POLICY}`, {
-        selector: (allPolicies) => allPolicies && Object.values(allPolicies).filter((policy) => policy && policyIDs.includes(policy.id)),
+        selector: (allPolicies) => (allPolicies ? Object.values(allPolicies).filter((policy) => policy && policyIDs.includes(policy.id)) : undefined),
         canBeMissing: true,
     });
     const selectedPoliciesTaxRates = policies?.map((policy) => policy?.taxRates?.taxes).filter((taxRates) => !!taxRates);
@@ -39,7 +39,23 @@ function SearchFiltersTaxRatePage() {
         if (!selectedPoliciesTaxRates) {
             return Object.entries(allTaxRates).map(([taxRateName, taxRateKeys]) => ({name: taxRateName, value: taxRateKeys}));
         }
-        return selectedPoliciesTaxRates.map((taxRates) => Object.entries(taxRates).map(([taxRateKey, taxRate]) => ({name: taxRate.name, value: [taxRateKey]}))).flat();
+        const selectedPoliciesTaxRatesItems = selectedPoliciesTaxRates.reduce(
+            (acc, taxRates) => {
+                Object.entries(taxRates).forEach(([taxRateKey, taxRate]) => {
+                    if (!acc[taxRate.name]) {
+                        acc[taxRate.name] = [];
+                    }
+                    if (acc[taxRate.name].includes(taxRateKey)) {
+                        return;
+                    }
+                    acc[taxRate.name].push(taxRateKey);
+                });
+                return acc;
+            },
+            {} as Record<string, string[]>,
+        );
+
+        return Object.entries(selectedPoliciesTaxRatesItems).map(([taxRateName, taxRateKeys]) => ({name: taxRateName, value: taxRateKeys}));
     }, [allTaxRates, selectedPoliciesTaxRates]);
 
     const updateTaxRateFilters = useCallback((values: string[]) => updateAdvancedFilters({taxRate: values}), []);