@RetMil22 wrote:
So my Employer must use the 2023 W4?
Yes. If you do want to change or update your withholding, you must use the current form.
It seems like there is probably a procedure to allow employers to calculate withholding for employees who have not submitted new forms since the tax reform law. If there is, it's probably in publication 15-T. And I suppose the employer has a computer program that can calculate withholding using the old formula for employees who have not submitted new forms. I actually have not updated my own W-4, since whatever my employer has on file for me is working, I have no reason to mess with it. However, you can't submit a new form using the old formula, you have to use the new form if you want to change anything.
