I have had the SAME issue with QB.

I have Contacted QuickBooks payroll assistant and they I have no idea.

They said if it’s not withholding anything then they don’t know anything. Wrong!!

Just like the other person said I have employees that are still using the 2019 or earlier that take out taxes with the same filing status.

please note users. Your employees Willow big time at the end of the year so I suggest doing what I did I put extra withholding in the $ it should take out for taxes.

The only drawback is when they miss work it will still take out the same with holding him out unless I go back and change it.

this has been a I’m going problem with QuickBooks and I can’t believe they have not fixed it by now. 
QuickBooks this is not an IRS issue.

QuickBooks this is not a user issue.

QuickBooks needs to do research on how their platform is set up and fix the issue.