Box 1 vs 16 on W2

My company doesnt take out my local taxes. Company is in NJ and i work from home in PA.

The HR dept takes forever to respond and i am just making estimated payments to PA myself for 2023.

Now for 2022 local tax, I would use box 16*local tax %, correct? I have nothing in box 18 so i need to use box 16, right?  I have to add PA and NJ box 16s together.

I noticed that box 1 is less than the box 16 total. i have a Roth 401K so shouldnt the box 1 total = box 16 total?

box 1 gets reduced by the 401K contrib amt, but that would be for traditional 401K, right? not Roth.