Retrieve a worker's state income tax withholding settings. The response has one entry for each state in which the worker has state income tax withholding settings. These are the elections the worker made on their state withholding form, and they affect the calculation and withholding of state income tax.

Pass state to retrieve a single state, or date to retrieve the settings that were in effect on a past date. See the Guide to the Worker Tax Withholdings API for how state settings differ from the federal W-4.