I have currently signed up for the National Guard(Michigan). I'm going to be getting a sign on bonus of 10,000 dollars. I have a bad five months and need to figure out how much money I'm actually going to get. I have claimed four on my W-2 with them. Is there a way to figure out how much money I will actually get.

Go to the finance department and ASK. They will sit down and do the calculations with you.