Well what you have presented is simply the usual creationist tactic of out-of-context quoting. But it seems that you haven't actually managed to fool anyone.
If you actually look at the form (p4 of the pdf) you will see that the "Income" section includes lines 7-22. The material you quote is part of the explanatory material for the section - starting with general information and going on to deal with the individual lines. It is NOT a definition of Income as you claim.
Moreover there IS an actual definition of Gross Income in Table A "Gross income means all income you received in the form of money, goods, property, and services that is not exempt from tax, including any income from sources outside the United States (even if you may exclude part or all of it). Do not include social security benefits unless you are married filing a separate return and you lived with your spouse at any time in 2004."
Now I assume that you did this deliberately to illustrate how out-of-context quotations can be used to misrepresent an issue. Although you don't seem to have fooled anyone here you might have better luck on a creationist-dominated forum. (As well as more of a point. As I say, this sort of misrepresentation is a common creationist tactic and it is a good idea to draw attention to it).