SAME HERE!! Makes no sense at all to tell QB to WH an addl amount and then only that amount is WH, NOT that amount PLUS the normal tax amount. My employee is not exempt and all the info remained the same except for updating to the 2020 W54 form and adding the addl tax to be WithHeld. I talked with support and they had no answer other than to increase the addl tax amount to the amount you really want WH.  Crazy!  This must be a glitch in the 2020 W4 form page.