I think I figured it out. The estimated taxes paid only appear on the 1120S and K-1 (federal). The amounts on the 510 are the taxes which I will pay with the 510, which are then readded back in the personal return. So if I paid $1000 estimated and owe only 700, then I pay 700 with the 510, and that gets added back to the $1000 on the personal return making it $1700. Since I owe only 700, I get back $1000. Man, that is one twisted way of doing things.
