fix(dashboard): Set default tax region as parent if no province is chosen (#7484)

* chore: allow tax region to be optional if no province is chosen

* chore: fallback region

packages/admin-next/dashboard/src/routes/taxes/tax-rate-create/components/tax-rate-create-form/tax-rate-create-form.tsx

@@ -72,6 +72,7 @@ export const TaxRateCreateForm = ({
 
   const form = useForm<zod.infer<typeof CreateTaxRateSchema>>({
     defaultValues: {
+      tax_region_id: taxRegion.id,
       selected_condition_types: {
         [ConditionEntities.PRODUCT]: true,
         [ConditionEntities.PRODUCT_TYPE]: false,
@@ -102,7 +103,7 @@ export const TaxRateCreateForm = ({
         code: data.code,
         rate: data.rate,
         is_combinable: data.is_combinable,
-        tax_region_id: data.tax_region_id,
+        tax_region_id: data.tax_region_id || taxRegion.id,
         rules:
           data.products?.map((product) => ({
             reference: "product",