Thanks Tom. I think I'm convinced there is a mistake in my W-2 since no number or combination of numbers on my W-2 come even close to matching the amount of tax withheld that I see from my YTD summary (and from tallying up my sell to cover proceedson my brokerage).
I did reach out to payroll and am waiting to hear back. Will update here if there is any new insight that may be helpful to others.
