Thanks so much. While it's a big, crude, and confusing, if you take the time to open forms it points to, eventually you figure out what a given number is. And this is exactly what I was looking for. I still need to get on the payroll site and figure out what my current W4 has so I can calculate the changes I want. Right now I would break even - about a $40 refund if my assumptions are correct, and obviously that's a bit close for comfort. And I still have to review it all, and I would love to have a what if for the state taxes, but those are a lot less crazy - I hope.
