Do all of my employees need to redo their W-4 form now that there is a new one in 2020?
Only new hires will have to complete the 2020 version of the W-4. Existing workers aren't required to complete a new W-4 form until they adjust their withholding. They can leave their 2019 (or prior) forms W-4 and withholding allowances unchanged.
Thank you for the feedback!