Tax help for military filers

That answer didn't really help. I have orders. I have W2. I have LES. But I don't know how to read them to get the information requested. Part of the problem is the word "deduction" - as in "Active Duty Pay Deduction." Does this mean that the entire amount he was paid while on active duty is the amount I type in the box? Not all of his active duty time was in a combat zone. I still don't know what to put in the box.