I'm with Knot, it's not that expensive to have the taxes tallied every 3 months.I think you can do it yearly also (in MO) but the pay in $ amount is smaller divided by 3
I did my taxes one year, and was happy that I was getting $250 back. My father-in-law who is an accountant had a look, and 3 hours later I had $756 on my fedral return