get https://{hostname}/configuration/v1/tax-groups
taxCalcGroupIdCode optional parameter can take in multiple IDs separated by comma. ex: [id1, id2] and taxGroupIsInactive is also optional. Permissions - UKG Pro service account must have 'View' role for the 'Company Configuration Integration' Web Service. Headers - US-Customer-Api-Key, Authorization (base64 encoded {username}:{password})